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771
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1 /* Text encoding conversion functions; coding-system object.
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2 #### rename me to coding-system.c or coding.c
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428
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3 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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771
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5 Copyright (C) 2000, 2001, 2002 Ben Wing.
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428
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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771
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24 /* Synched up with: Not in FSF. */
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25
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26 /* Authorship:
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27
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28 Current primary author: Ben Wing <ben@xemacs.org>
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29
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30 Rewritten by Ben Wing <ben@xemacs.org>, based originally on coding.c
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31 from Mule 2.? but probably does not share one line of code with that
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32 original source. Rewriting work started around Dec. 1994. or Jan. 1995.
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33 Proceeded in earnest till Nov. 1995.
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34
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35 Around Feb. 17, 1998, Andy Piper renamed what was then mule-coding.c to
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36 file-coding.c, with the intention of using it to do end-of-line conversion
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37 on non-MULE machines (specifically, on Windows machines). He separated
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38 out the MULE stuff from non-MULE using ifdef's, and searched throughout
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39 the rest of the source tree looking for coding-system-related code that
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40 was ifdef MULE but should be ifdef HAVE_CODING_SYSTEMS.
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41
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42 Sept. 4 - 8, 1998, Tomohiko Morioka added the UCS_4 and UTF_8 coding system
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43 types, providing a primitive means of decoding and encoding externally-
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44 formatted Unicode/UCS_4 and Unicode/UTF_8 data.
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45
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46 January 25, 2000, Martin Buchholz redid and fleshed out the coding
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47 system alias handling that was first added in prototype form by
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48 Hrjove Niksic, April 15, 1999.
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49
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50 April to May 2000, Ben Wing: More major reorganization. Adding features
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51 needed for MS Windows (multibyte, unicode, unicode-to-multibyte), the
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52 "chain" coding system for chaining two together, and doing a lot of
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53 reorganization in preparation for properly abstracting out the different
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54 coding system types.
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55
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56 June 2001, Ben Wing: Added Unicode support. Eliminated previous
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57 junky Unicode translation support.
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58
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59 August 2001, Ben Wing: Moved Unicode support to unicode.c. Finished
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60 abstracting everything except detection, which is hard to abstract (see
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61 just below).
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62
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63 September 2001, Ben Wing: Moved Mule code to mule-coding.c, Windows code
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64 to intl-win32.c. Lots more rewriting; very little code is untouched
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65 from before April 2000. Abstracted the detection code, added multiple
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66 levels of likelihood to increase the reliability of the algorithm.
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67
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68 October 2001, Ben Wing: HAVE_CODING_SYSTEMS is always now defined.
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69 Removed the conditionals.
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70 */
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71
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72 /* Comments about future work
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73
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74 ------------------------------------------------------------------
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75 ABOUT DETECTION
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76 ------------------------------------------------------------------
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77
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78 however, in general the detection code has major problems and needs lots
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79 of work:
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80
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81 -- instead of merely "yes" or "no" for particular categories, we need a
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82 more flexible system, with various levels of likelihood. Currently
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83 I've created a system with six levels, as follows:
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84
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85 [see file-coding.h]
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86
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87 Let's consider what this might mean for an ASCII text detector. (In
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88 order to have accurate detection, especially given the iteration I
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89 proposed below, we need active detectors for *all* types of data we
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90 might reasonably encounter, such as ASCII text files, binary files,
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91 and possibly other sorts of ASCII files, and not assume that simply
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92 "falling back to no detection" will work at all well.)
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93
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94 An ASCII text detector DOES NOT report ASCII text as level 0, since
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95 that's what the detector is looking for. Such a detector ideally
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96 wants all bytes in the range 0x20 - 0x7E (no high bytes!), except for
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97 whitespace control chars and perhaps a few others; LF, CR, or CRLF
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98 sequences at regular intervals (where "regular" might mean an average
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99 < 100 chars and 99% < 300 for code and other stuff of the "text file
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100 w/line breaks" variety, but for the "text file w/o line breaks"
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101 variety, excluding blank lines, averages could easily be 600 or more
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102 with 2000-3000 char "lines" not so uncommon); similar statistical
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103 variance between odds and evens (not Unicode); frequent occurrences of
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104 the space character; letters more common than non-letters; etc. Also
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105 checking for too little variability between frequencies of characters
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106 and for exclusion of particular characters based on character ranges
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107 can catch ASCII encodings like base-64, UUEncode, UTF-7, etc.
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108 Granted, this doesn't even apply to everything called "ASCII", and we
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109 could potentially distinguish off ASCII for code, ASCII for text,
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110 etc. as separate categories. However, it does give us a lot to work
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111 off of, in deciding what likelihood to choose -- and it shows there's
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112 in fact a lot of detectable patterns to look for even in something
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113 seemingly so generic as ASCII. The detector would report most text
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114 files in level 1 or level 2. EUC encodings, Shift-JIS, etc. probably
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115 go to level -1 because they also pass the EOL test and all other tests
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116 for the ASCII part of the text, but have lots of high bytes, which in
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117 essence turn them into binary. Aberrant text files like something in
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118 BASE64 encoding might get placed in level 0, because they pass most
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119 tests but fail dramatically the frequency test; but they should not be
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120 reported as any lower, because that would cause explicit prompting,
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121 and the user should be able any valid text file without prompting.
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122 The escape sequences and the base-64-type checks might send 7-bit
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123 iso2022 to 0, but probably not -1, for similar reasons.
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124
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125 -- The assumed algorithm for the above detection levels is to in essence
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126 sort categories first by detection level and then by priority.
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127 Perhaps, however, we would want smarter algorithms, or at least
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128 something user-controllable -- in particular, when (other than no
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129 category at level 0 or greater) do we prompt the user to pick a
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130 category?
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131
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132 -- Improvements in how the detection algorithm works: we want to handle
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133 lots of different ways something could be encoded, including multiple
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134 stacked encodings. trying to specify a series of detection levels
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135 (check for base64 first, then check for gzip, then check for an i18n
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136 decoding, then for crlf) won't generally work. for example, what
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137 about the same encoding appearing more than once? for example, take
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138 euc-jp, base64'd, then gzip'd, then base64'd again: this could well
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139 happen, and you could specify the encodings specifically as
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140 base64|gzip|base64|euc-jp, but we'd like to autodetect it without
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141 worrying about exactly what order these things appear in. we should
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142 allow for iterating over detection/decoding cycles until we reach
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143 some maximum (we got stuck in a loop, due to incorrect category
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144 tables or detection algorithms), have no reported detection levels
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145 over -1, or we end up with no change after a decoding pass (i.e. the
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146 coding system associated with a chosen category was `no-conversion'
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147 or something equivalent). it might make sense to divide things into
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148 two phases (internal and external), where the internal phase has a
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149 separate category list and would probably mostly end up handling EOL
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150 detection; but the i think about it, the more i disagree. with
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151 properly written detectors, and properly organized tables (in
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152 general, those decodings that are more "distinctive" and thus
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153 detectable with greater certainty go lower on the list), we shouldn't
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154 need two phases. for example, let's say the example above was also
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155 in CRLF format. The EOL detector (which really detects *plain text*
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156 with a particular EOL type) would return at most level 0 for all
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157 results until the text file is reached, whereas the base64, gzip or
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158 euc-jp decoders will return higher. Once the text file is reached,
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159 the EOL detector will return 0 or higher for the CRLF encoding, and
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160 all other decoders will return 0 or lower; thus, we will successfully
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161 proceed through CRLF decoding, or at worst prompt the user. (The only
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162 external-vs-internal distinction that might make sense here is to
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163 favor coding systems of the correct source type over those that
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164 require conversion between external and internal; if done right, this
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165 could allow the CRLF detector to return level 1 for all CRLF-encoded
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166 text files, even those that look like Base-64 or similar encoding, so
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167 that CRLF encoding will always get decoded without prompting, but not
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168 interfere with other decoders. On the other hand, this
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169 external-vs-internal distinction may not matter at all -- with
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170 automatic internal-external conversion, CRLF decoding can occur
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171 before or after decoding of euc-jp, base64, iso2022, or similar,
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172 without any difference in the final results.)
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173
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174 -- There need to be two priority lists and two
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175 category->coding-system lists. Once is general, the other
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176 category->langenv-specific. The user sets the former, the langenv
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177 category->the latter. The langenv-specific entries take precedence
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178 category->over the others. This works similarly to the
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179 category->category->Unicode charset priority list.
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180
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181 -- The simple list of coding categories per detectors is not enough.
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182 Instead of coding categories, we need parameters. For example,
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183 Unicode might have separate detectors for UTF-8, UTF-7, UTF-16,
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184 and perhaps UCS-4; or UTF-16/UCS-4 would be one detection type.
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185 UTF-16 would have parameters such as "little-endian" and "needs BOM",
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186 and possibly another one like "collapse/expand/leave alone composite
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187 sequences" once we add this support. Usually these parameters
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188 correspond directly to a coding system parameter. Different
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189 likelihood values can be specified for each parameter as well as for
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190 the detection type as a whole. The user can specify particular
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191 coding systems for a particular combination of detection type and
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192 parameters, or can give "default parameters" associated with a
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193 detection type. In the latter case, we create a new coding system as
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194 necessary that corresponds to the detected type and parameters.
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195
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196 -- a better means of presentation. rather than just coming up
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197 with the new file decoded according to the detected coding
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198 system, allow the user to browse through the file and
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199 conveniently reject it if it looks wrong; then detection
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200 starts again, but with that possibility removed. in cases where
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201 certainty is low and thus more than one possibility is presented,
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202 the user can browse each one and select one or reject them all.
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203
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204 -- fail-safe: even after the user has made a choice, if they
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205 later on realize they have the wrong coding system, they can
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206 go back, and we've squirreled away the original data so they
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207 can start the process over. this may be tricky.
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208
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209 -- using a larger buffer for detection. we use just a small
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210 piece, which can give quite random results. we may need to
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211 buffer up all the data we look through because we can't
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212 necessarily rewind. the idea is we proceed until we get a
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213 result that's at least at a certain level of certainty
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214 (e.g. "probable") or we reached a maximum limit of how much
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215 we want to buffer.
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216
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217 -- dealing with interactive systems. we might need to go ahead
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218 and present the data before we've finished detection, and
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219 then re-decode it, perhaps multiple times, as we get better
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220 detection results.
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221
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222 -- Clearly some of these are more important than others. at the
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223 very least, the "better means of presentation" should be
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224 implementation as soon as possibl, along with a very simple means
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225 of fail-safe whenever the data is readibly available, e.g. it's
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226 coming from a file, which is the most common scenario.
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227
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228
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229 ------------------------------------------------------------------
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230 ABOUT FORMATS
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231 ------------------------------------------------------------------
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232
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233 when calling make-coding-system, the name can be a cons of (format1 .
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234 format2), specifying that it decodes format1->format2 and encodes the other
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235 way. if only one name is given, that is assumed to be format1, and the
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236 other is either `external' or `internal' depending on the end type.
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237 normally the user when decoding gives the decoding order in formats, but
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238 can leave off the last one, `internal', which is assumed. a multichain
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239 might look like gzip|multibyte|unicode, using the coding systems named
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240 `gzip', `(unicode . multibyte)' and `unicode'. the way this actually works
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241 is by searching for gzip->multibyte; if not found, look for gzip->external
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242 or gzip->internal. (In general we automatically do conversion between
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243 internal and external as necessary: thus gzip|crlf does the expected, and
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244 maps to gzip->external, external->internal, crlf->internal, which when
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245 fully specified would be gzip|external:external|internal:crlf|internal --
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246 see below.) To forcibly fit together two converters that have explicitly
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247 specified and incompatible names (say you have unicode->multibyte and
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248 iso8859-1->ebcdic and you know that the multibyte and iso8859-1 in this
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249 case are compatible), you can force-cast using :, like this:
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250 ebcdic|iso8859-1:multibyte|unicode. (again, if you force-cast between
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251 internal and external formats, the conversion happens automatically.)
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252
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253 --------------------------------------------------------------------------
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254 ABOUT PDUMP, UNICODE, AND RUNNING XEMACS FROM A DIRECTORY WITH WEIRD CHARS
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255 --------------------------------------------------------------------------
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256
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257 -- there's the problem that XEmacs can't be run in a directory with
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258 non-ASCII/Latin-1 chars in it, since it will be doing Unicode
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259 processing before we've had a chance to load the tables. In fact,
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260 even finding the tables in such a situation is problematic using
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261 the normal commands. my idea is to eventually load the stuff
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262 extremely extremely early, at the same time as the pdump data gets
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263 loaded. in fact, the unicode table data (stored in an efficient
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264 binary format) can even be stuck into the pdump file (which would
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265 mean as a resource to the executable, for windows). we'd need to
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266 extend pdump a bit: to allow for attaching extra data to the pdump
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267 file. (something like pdump_attach_extra_data (addr, length)
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268 returns a number of some sort, an index into the file, which you
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269 can then retrieve with pdump_load_extra_data(), which returns an
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270 addr (mmap()ed or loaded), and later you pdump_unload_extra_data()
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271 when finished. we'd probably also need
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272 pdump_attach_extra_data_append(), which appends data to the data
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273 just written out with pdump_attach_extra_data(). this way,
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274 multiple tables in memory can be written out into one contiguous
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275 table. (we'd use the tar-like trick of allowing new blocks to be
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276 written without going back to change the old blocks -- we just rely
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277 on the end of file/end of memory.) this same mechanism could be
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278 extracted out of pdump and used to handle the non-pdump situation
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279 (or alternatively, we could just dump either the memory image of
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280 the tables themselves or the compressed binary version). in the
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281 case of extra unicode tables not known about at compile time that
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282 get loaded before dumping, we either just dump them into the image
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283 (pdump and all) or extract them into the compressed binary format,
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284 free the original tables, and treat them like all other tables.
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285
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286 --------------------------------------------------------------------------
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287 HANDLING WRITING A FILE SAFELY, WITHOUT DATA LOSS
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288 --------------------------------------------------------------------------
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289
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290 -- When writing a file, we need error detection; otherwise somebody
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291 will create a Unicode file without realizing the coding system
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292 of the buffer is Raw, and then lose all the non-ASCII/Latin-1
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293 text when it's written out. We need two levels
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294
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295 1. first, a "safe-charset" level that checks before any actual
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296 encoding to see if all characters in the document can safely
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297 be represented using the given coding system. FSF has a
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298 "safe-charset" property of coding systems, but it's stupid
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299 because this information can be automatically derived from
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300 the coding system, at least the vast majority of the time.
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301 What we need is some sort of
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302 alternative-coding-system-precedence-list, langenv-specific,
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303 where everything on it can be checked for safe charsets and
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304 then the user given a list of possibilities. When the user
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305 does "save with specified encoding", they should see the same
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306 precedence list. Again like with other precedence lists,
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307 there's also a global one, and presumably all coding systems
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308 not on other list get appended to the end (and perhaps not
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309 checked at all when doing safe-checking?). safe-checking
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310 should work something like this: compile a list of all
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311 charsets used in the buffer, along with a count of chars
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312 used. that way, "slightly unsafe" charsets can perhaps be
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313 presented at the end, which will lose only a few characters
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314 and are perhaps what the users were looking for.
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315
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316 2. when actually writing out, we need error checking in case an
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317 individual char in a charset can't be written even though the
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318 charsets are safe. again, the user gets the choice of other
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319 reasonable coding systems.
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320
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321 3. same thing (error checking, list of alternatives, etc.) needs
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322 to happen when reading! all of this will be a lot of work!
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323
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324
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325 --ben
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326 */
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428
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327
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328 #include <config.h>
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329 #include "lisp.h"
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330
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331 #include "buffer.h"
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332 #include "elhash.h"
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333 #include "insdel.h"
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334 #include "lstream.h"
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440
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335 #include "opaque.h"
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771
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336 #include "file-coding.h"
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337
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338 #ifdef HAVE_ZLIB
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339 #include "zlib.h"
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428
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340 #endif
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341
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342 Lisp_Object Vkeyboard_coding_system;
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343 Lisp_Object Vterminal_coding_system;
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344 Lisp_Object Vcoding_system_for_read;
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345 Lisp_Object Vcoding_system_for_write;
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346 Lisp_Object Vfile_name_coding_system;
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347
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771
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348 #ifdef DEBUG_XEMACS
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349 Lisp_Object Vdebug_coding_detection;
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440
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350 #endif
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771
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351
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352 typedef struct coding_system_type_entry
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353 {
|
|
|
354 struct coding_system_methods *meths;
|
|
|
355 } coding_system_type_entry;
|
|
|
356
|
|
|
357 typedef struct
|
|
|
358 {
|
|
|
359 Dynarr_declare (coding_system_type_entry);
|
|
|
360 } coding_system_type_entry_dynarr;
|
|
|
361
|
|
|
362 static coding_system_type_entry_dynarr *the_coding_system_type_entry_dynarr;
|
|
|
363
|
|
|
364 static const struct lrecord_description cste_description_1[] = {
|
|
|
365 { XD_STRUCT_PTR, offsetof (coding_system_type_entry, meths), 1, &coding_system_methods_description },
|
|
|
366 { XD_END }
|
|
|
367 };
|
|
|
368
|
|
|
369 static const struct struct_description cste_description = {
|
|
|
370 sizeof (coding_system_type_entry),
|
|
|
371 cste_description_1
|
|
|
372 };
|
|
|
373
|
|
|
374 static const struct lrecord_description csted_description_1[] = {
|
|
|
375 XD_DYNARR_DESC (coding_system_type_entry_dynarr, &cste_description),
|
|
428
|
376 { XD_END }
|
|
|
377 };
|
|
|
378
|
|
771
|
379 static const struct struct_description csted_description = {
|
|
|
380 sizeof (coding_system_type_entry_dynarr),
|
|
|
381 csted_description_1
|
|
|
382 };
|
|
|
383
|
|
|
384 static Lisp_Object Vcoding_system_type_list;
|
|
|
385
|
|
|
386 /* Coding system currently associated with each coding category. */
|
|
|
387 Lisp_Object coding_category_system[MAX_DETECTOR_CATEGORIES];
|
|
|
388
|
|
|
389 /* Table of all coding categories in decreasing order of priority.
|
|
|
390 This describes a permutation of the possible coding categories. */
|
|
|
391 int coding_category_by_priority[MAX_DETECTOR_CATEGORIES];
|
|
|
392
|
|
|
393 /* Value used with to give a unique name to nameless coding systems */
|
|
|
394 int coding_system_tick;
|
|
|
395
|
|
|
396 int coding_detector_count;
|
|
|
397 int coding_detector_category_count;
|
|
|
398
|
|
|
399 detector_dynarr *all_coding_detectors;
|
|
|
400
|
|
|
401 static const struct lrecord_description struct_detector_category_description_1[]
|
|
|
402 =
|
|
|
403 {
|
|
|
404 { XD_LISP_OBJECT, offsetof (struct detector_category, sym) },
|
|
|
405 { XD_END }
|
|
|
406 };
|
|
|
407
|
|
|
408 static const struct struct_description struct_detector_category_description =
|
|
|
409 {
|
|
|
410 sizeof (struct detector_category),
|
|
|
411 struct_detector_category_description_1
|
|
428
|
412 };
|
|
|
413
|
|
771
|
414 static const struct lrecord_description detector_category_dynarr_description_1[] =
|
|
|
415 {
|
|
|
416 XD_DYNARR_DESC (detector_category_dynarr,
|
|
|
417 &struct_detector_category_description),
|
|
|
418 { XD_END }
|
|
|
419 };
|
|
|
420
|
|
|
421 static const struct struct_description detector_category_dynarr_description = {
|
|
|
422 sizeof (detector_category_dynarr),
|
|
|
423 detector_category_dynarr_description_1
|
|
|
424 };
|
|
|
425
|
|
|
426 static const struct lrecord_description struct_detector_description_1[]
|
|
|
427 =
|
|
|
428 {
|
|
|
429 { XD_STRUCT_PTR, offsetof (struct detector, cats), 1,
|
|
|
430 &detector_category_dynarr_description },
|
|
|
431 { XD_END }
|
|
|
432 };
|
|
|
433
|
|
|
434 static const struct struct_description struct_detector_description =
|
|
|
435 {
|
|
|
436 sizeof (struct detector),
|
|
|
437 struct_detector_description_1
|
|
|
438 };
|
|
|
439
|
|
|
440 static const struct lrecord_description detector_dynarr_description_1[] =
|
|
|
441 {
|
|
|
442 XD_DYNARR_DESC (detector_dynarr, &struct_detector_description),
|
|
|
443 { XD_END }
|
|
|
444 };
|
|
|
445
|
|
|
446 static const struct struct_description detector_dynarr_description = {
|
|
|
447 sizeof (detector_dynarr),
|
|
|
448 detector_dynarr_description_1
|
|
|
449 };
|
|
428
|
450
|
|
|
451 Lisp_Object Qcoding_systemp;
|
|
|
452
|
|
771
|
453 Lisp_Object Qraw_text;
|
|
428
|
454
|
|
|
455 Lisp_Object Qmnemonic, Qeol_type;
|
|
|
456 Lisp_Object Qcr, Qcrlf, Qlf;
|
|
|
457 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
|
|
|
458 Lisp_Object Qpost_read_conversion;
|
|
|
459 Lisp_Object Qpre_write_conversion;
|
|
|
460
|
|
771
|
461 Lisp_Object Qtranslation_table_for_decode;
|
|
|
462 Lisp_Object Qtranslation_table_for_encode;
|
|
|
463 Lisp_Object Qsafe_chars;
|
|
|
464 Lisp_Object Qsafe_charsets;
|
|
|
465 Lisp_Object Qmime_charset;
|
|
|
466 Lisp_Object Qvalid_codes;
|
|
|
467
|
|
|
468 Lisp_Object Qno_conversion;
|
|
|
469 Lisp_Object Qconvert_eol;
|
|
440
|
470 Lisp_Object Qescape_quoted;
|
|
771
|
471 Lisp_Object Qencode, Qdecode;
|
|
|
472
|
|
|
473 Lisp_Object Qconvert_eol_lf, Qconvert_eol_cr, Qconvert_eol_crlf;
|
|
|
474 Lisp_Object Qconvert_eol_autodetect;
|
|
|
475
|
|
|
476 Lisp_Object Qnear_certainty, Qquite_probable, Qsomewhat_likely;
|
|
|
477 Lisp_Object Qas_likely_as_unlikely, Qsomewhat_unlikely, Qquite_improbable;
|
|
|
478 Lisp_Object Qnearly_impossible;
|
|
|
479
|
|
|
480 Lisp_Object Qdo_eol, Qdo_coding;
|
|
|
481
|
|
|
482 Lisp_Object Qcanonicalize_after_coding;
|
|
|
483
|
|
|
484 /* This is used to convert autodetected coding systems into existing
|
|
|
485 systems. For example, the chain undecided->convert-eol-autodetect may
|
|
|
486 have its separate parts detected as mswindows-multibyte and
|
|
|
487 convert-eol-crlf, and the result needs to be mapped to
|
|
|
488 mswindows-multibyte-dos. */
|
|
|
489 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
490 any more. */
|
|
|
491 static Lisp_Object Vchain_canonicalize_hash_table;
|
|
|
492
|
|
|
493 #ifdef HAVE_ZLIB
|
|
|
494 Lisp_Object Qgzip;
|
|
428
|
495 #endif
|
|
771
|
496
|
|
|
497 /* Maps coding system names to either coding system objects or (for
|
|
|
498 aliases) other names. */
|
|
|
499 static Lisp_Object Vcoding_system_hash_table;
|
|
428
|
500
|
|
|
501 int enable_multibyte_characters;
|
|
|
502
|
|
|
503 EXFUN (Fcopy_coding_system, 2);
|
|
|
504
|
|
|
505
|
|
|
506 /************************************************************************/
|
|
771
|
507 /* Coding system object methods */
|
|
428
|
508 /************************************************************************/
|
|
|
509
|
|
|
510 static Lisp_Object
|
|
|
511 mark_coding_system (Lisp_Object obj)
|
|
|
512 {
|
|
|
513 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
|
|
|
514
|
|
|
515 mark_object (CODING_SYSTEM_NAME (codesys));
|
|
771
|
516 mark_object (CODING_SYSTEM_DESCRIPTION (codesys));
|
|
428
|
517 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
|
|
771
|
518 mark_object (CODING_SYSTEM_DOCUMENTATION (codesys));
|
|
428
|
519 mark_object (CODING_SYSTEM_EOL_LF (codesys));
|
|
|
520 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
|
|
|
521 mark_object (CODING_SYSTEM_EOL_CR (codesys));
|
|
771
|
522 mark_object (CODING_SYSTEM_SUBSIDIARY_PARENT (codesys));
|
|
|
523 mark_object (CODING_SYSTEM_CANONICAL (codesys));
|
|
|
524
|
|
|
525 MAYBE_CODESYSMETH (codesys, mark, (obj));
|
|
428
|
526
|
|
|
527 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
|
528 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
|
529 }
|
|
|
530
|
|
|
531 static void
|
|
771
|
532 print_coding_system_properties (Lisp_Object obj, Lisp_Object printcharfun)
|
|
|
533 {
|
|
|
534 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
535 print_internal (c->methods->type, printcharfun, 1);
|
|
|
536 MAYBE_CODESYSMETH (c, print, (obj, printcharfun, 1));
|
|
|
537 if (CODING_SYSTEM_EOL_TYPE (c) != EOL_AUTODETECT)
|
|
|
538 write_fmt_string_lisp (printcharfun, " eol-type=%s",
|
|
|
539 1, Fcoding_system_property (obj, Qeol_type));
|
|
|
540 }
|
|
|
541
|
|
|
542 static void
|
|
428
|
543 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
544 int escapeflag)
|
|
|
545 {
|
|
|
546 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
547 if (print_readably)
|
|
771
|
548 printing_unreadable_object
|
|
|
549 ("printing unreadable object #<coding-system 0x%x>", c->header.uid);
|
|
|
550
|
|
|
551 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name);
|
|
|
552 print_coding_system_properties (obj, printcharfun);
|
|
826
|
553 write_c_string (printcharfun, ">");
|
|
428
|
554 }
|
|
|
555
|
|
771
|
556 /* Print an abbreviated version of a coding system (but still containing
|
|
|
557 all the information), for use within a coding system print method. */
|
|
|
558
|
|
|
559 static void
|
|
|
560 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun,
|
|
|
561 int escapeflag)
|
|
|
562 {
|
|
800
|
563 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs));
|
|
771
|
564 print_coding_system_properties (cs, printcharfun);
|
|
826
|
565 write_c_string (printcharfun, "]");
|
|
771
|
566 }
|
|
|
567
|
|
428
|
568 static void
|
|
|
569 finalize_coding_system (void *header, int for_disksave)
|
|
|
570 {
|
|
771
|
571 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header);
|
|
428
|
572 /* Since coding systems never go away, this function is not
|
|
|
573 necessary. But it would be necessary if we changed things
|
|
|
574 so that coding systems could go away. */
|
|
|
575 if (!for_disksave) /* see comment in lstream.c */
|
|
771
|
576 MAYBE_XCODESYSMETH (cs, finalize, (cs));
|
|
|
577 }
|
|
|
578
|
|
|
579 static Bytecount
|
|
|
580 sizeof_coding_system (const void *header)
|
|
|
581 {
|
|
|
582 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header;
|
|
|
583 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size;
|
|
428
|
584 }
|
|
|
585
|
|
771
|
586 static const struct lrecord_description coding_system_methods_description_1[]
|
|
|
587 = {
|
|
|
588 { XD_LISP_OBJECT,
|
|
|
589 offsetof (struct coding_system_methods, type) },
|
|
|
590 { XD_LISP_OBJECT,
|
|
|
591 offsetof (struct coding_system_methods, predicate_symbol) },
|
|
|
592 { XD_END }
|
|
|
593 };
|
|
|
594
|
|
|
595 const struct struct_description coding_system_methods_description = {
|
|
|
596 sizeof (struct coding_system_methods),
|
|
|
597 coding_system_methods_description_1
|
|
|
598 };
|
|
|
599
|
|
|
600 const struct lrecord_description coding_system_empty_extra_description[] = {
|
|
|
601 { XD_END }
|
|
|
602 };
|
|
|
603
|
|
|
604 static const struct lrecord_description coding_system_description[] =
|
|
428
|
605 {
|
|
771
|
606 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, methods), 1,
|
|
|
607 &coding_system_methods_description },
|
|
|
608 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
|
|
|
609 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, description) },
|
|
|
610 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
|
|
|
611 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, documentation) },
|
|
|
612 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
|
|
|
613 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
|
|
|
614 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, text_file_wrapper) },
|
|
|
615 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, auto_eol_wrapper) },
|
|
|
616 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[0]) },
|
|
|
617 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[1]) },
|
|
|
618 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[2]) },
|
|
|
619 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, subsidiary_parent) },
|
|
|
620 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, canonical) },
|
|
|
621 { XD_CODING_SYSTEM_END }
|
|
|
622 };
|
|
|
623
|
|
934
|
624 #ifdef USE_KKCC
|
|
|
625 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system,
|
|
|
626 1, /*dumpable-flag*/
|
|
|
627 mark_coding_system,
|
|
|
628 print_coding_system,
|
|
|
629 finalize_coding_system,
|
|
|
630 0, 0, coding_system_description,
|
|
|
631 sizeof_coding_system,
|
|
|
632 Lisp_Coding_System);
|
|
|
633 #else /* not USE_KKCC */
|
|
771
|
634 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system,
|
|
|
635 mark_coding_system,
|
|
|
636 print_coding_system,
|
|
|
637 finalize_coding_system,
|
|
|
638 0, 0, coding_system_description,
|
|
|
639 sizeof_coding_system,
|
|
|
640 Lisp_Coding_System);
|
|
934
|
641 #endif /* not USE_KKCC */
|
|
771
|
642
|
|
|
643 /************************************************************************/
|
|
|
644 /* Creating coding systems */
|
|
|
645 /************************************************************************/
|
|
|
646
|
|
|
647 static struct coding_system_methods *
|
|
|
648 decode_coding_system_type (Lisp_Object type, Error_Behavior errb)
|
|
428
|
649 {
|
|
771
|
650 int i;
|
|
|
651
|
|
|
652 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++)
|
|
428
|
653 {
|
|
771
|
654 if (EQ (type,
|
|
|
655 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type))
|
|
|
656 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths;
|
|
428
|
657 }
|
|
771
|
658
|
|
|
659 maybe_invalid_constant ("Invalid coding system type", type,
|
|
|
660 Qcoding_system, errb);
|
|
|
661
|
|
|
662 return 0;
|
|
428
|
663 }
|
|
|
664
|
|
771
|
665 static int
|
|
|
666 valid_coding_system_type_p (Lisp_Object type)
|
|
428
|
667 {
|
|
771
|
668 return decode_coding_system_type (type, ERROR_ME_NOT) != 0;
|
|
|
669 }
|
|
|
670
|
|
|
671 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /*
|
|
|
672 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid.
|
|
|
673 Valid types depend on how XEmacs was compiled but may include
|
|
|
674 'undecided, 'chain, 'integer, 'ccl, 'iso2022, 'big5, 'shift-jis,
|
|
|
675 'utf-16, 'ucs-4, 'utf-8, etc.
|
|
|
676 */
|
|
|
677 (coding_system_type))
|
|
|
678 {
|
|
|
679 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil;
|
|
|
680 }
|
|
|
681
|
|
|
682 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /*
|
|
|
683 Return a list of valid coding system types.
|
|
|
684 */
|
|
|
685 ())
|
|
|
686 {
|
|
|
687 return Fcopy_sequence (Vcoding_system_type_list);
|
|
|
688 }
|
|
|
689
|
|
|
690 void
|
|
|
691 add_entry_to_coding_system_type_list (struct coding_system_methods *meths)
|
|
|
692 {
|
|
|
693 struct coding_system_type_entry entry;
|
|
|
694
|
|
|
695 entry.meths = meths;
|
|
|
696 Dynarr_add (the_coding_system_type_entry_dynarr, entry);
|
|
|
697 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list);
|
|
428
|
698 }
|
|
|
699
|
|
|
700 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
701 Return t if OBJECT is a coding system.
|
|
|
702 A coding system is an object that defines how text containing multiple
|
|
|
703 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
704 The coding system is used to decode the stream into a series of
|
|
|
705 characters (which may be from multiple charsets) when the text is read
|
|
|
706 from a file or process, and is used to encode the text back into the
|
|
|
707 same format when it is written out to a file or process.
|
|
|
708
|
|
|
709 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
710 Text, which is used for inter-client data under the X Window System)
|
|
|
711 use escape sequences to switch between different charsets -- Japanese
|
|
|
712 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
713 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
714 `make-coding-system' for more information.
|
|
|
715
|
|
|
716 Coding systems are normally identified using a symbol, and the
|
|
|
717 symbol is accepted in place of the actual coding system object whenever
|
|
|
718 a coding system is called for. (This is similar to how faces work.)
|
|
|
719 */
|
|
|
720 (object))
|
|
|
721 {
|
|
|
722 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
723 }
|
|
|
724
|
|
|
725 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
726 Retrieve the coding system of the given name.
|
|
|
727
|
|
|
728 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
729 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
730 If there is no such coding system, nil is returned. Otherwise the
|
|
|
731 associated coding system object is returned.
|
|
|
732 */
|
|
|
733 (coding_system_or_name))
|
|
|
734 {
|
|
|
735 if (NILP (coding_system_or_name))
|
|
|
736 coding_system_or_name = Qbinary;
|
|
440
|
737 else if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
738 return coding_system_or_name;
|
|
428
|
739 else
|
|
|
740 CHECK_SYMBOL (coding_system_or_name);
|
|
|
741
|
|
440
|
742 while (1)
|
|
|
743 {
|
|
|
744 coding_system_or_name =
|
|
|
745 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
746
|
|
771
|
747 if (CODING_SYSTEMP (coding_system_or_name)
|
|
|
748 || NILP (coding_system_or_name))
|
|
440
|
749 return coding_system_or_name;
|
|
|
750 }
|
|
428
|
751 }
|
|
|
752
|
|
|
753 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
754 Retrieve the coding system of the given name.
|
|
|
755 Same as `find-coding-system' except that if there is no such
|
|
|
756 coding system, an error is signaled instead of returning nil.
|
|
|
757 */
|
|
|
758 (name))
|
|
|
759 {
|
|
|
760 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
761
|
|
|
762 if (NILP (coding_system))
|
|
563
|
763 invalid_argument ("No such coding system", name);
|
|
428
|
764 return coding_system;
|
|
|
765 }
|
|
|
766
|
|
771
|
767 int
|
|
|
768 coding_system_is_binary (Lisp_Object coding_system)
|
|
|
769 {
|
|
|
770 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
771 return
|
|
|
772 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) &&
|
|
|
773 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF &&
|
|
|
774 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) &&
|
|
|
775 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil));
|
|
|
776 }
|
|
|
777
|
|
|
778 static Lisp_Object
|
|
|
779 coding_system_real_canonical (Lisp_Object cs)
|
|
|
780 {
|
|
|
781 if (!NILP (XCODING_SYSTEM_CANONICAL (cs)))
|
|
|
782 return XCODING_SYSTEM_CANONICAL (cs);
|
|
|
783 return cs;
|
|
|
784 }
|
|
|
785
|
|
|
786 /* Return true if coding system is of the "standard" type that decodes
|
|
|
787 bytes into characters (suitable for decoding a text file). */
|
|
|
788 int
|
|
|
789 coding_system_is_for_text_file (Lisp_Object coding_system)
|
|
|
790 {
|
|
|
791 return (XCODESYSMETH_OR_GIVEN
|
|
|
792 (coding_system, conversion_end_type,
|
|
|
793 (coding_system_real_canonical (coding_system)),
|
|
|
794 DECODES_BYTE_TO_CHARACTER) ==
|
|
|
795 DECODES_BYTE_TO_CHARACTER);
|
|
|
796 }
|
|
|
797
|
|
|
798 static int
|
|
|
799 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
800 {
|
|
|
801 enum source_sink_type type =
|
|
|
802 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type,
|
|
|
803 (coding_system_real_canonical (cs)),
|
|
|
804 DECODES_BYTE_TO_CHARACTER);
|
|
|
805 if (sex == CODING_SOURCE)
|
|
|
806 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
807 type == DECODES_CHARACTER_TO_BYTE);
|
|
|
808 else
|
|
|
809 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
810 type == DECODES_BYTE_TO_CHARACTER);
|
|
|
811 }
|
|
|
812
|
|
|
813 static int
|
|
|
814 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
815 {
|
|
|
816 return decoding_source_sink_type_is_char (cs,
|
|
|
817 /* Sex change */
|
|
|
818 sex == CODING_SOURCE ?
|
|
|
819 CODING_SINK : CODING_SOURCE);
|
|
|
820 }
|
|
|
821
|
|
|
822 /* Like Ffind_coding_system() but check that the coding system is of the
|
|
|
823 "standard" type that decodes bytes into characters (suitable for
|
|
|
824 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
825 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
826 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
827 system to do this. */
|
|
|
828
|
|
|
829 Lisp_Object
|
|
|
830 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
831 {
|
|
|
832 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
833 Lisp_Object wrapper = coding_system;
|
|
|
834
|
|
|
835 if (NILP (coding_system))
|
|
|
836 return Qnil;
|
|
|
837 if (!coding_system_is_for_text_file (coding_system))
|
|
|
838 {
|
|
|
839 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system);
|
|
|
840 if (NILP (wrapper))
|
|
|
841 {
|
|
|
842 Lisp_Object chain;
|
|
|
843 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK))
|
|
|
844 chain = list2 (coding_system, Qbinary);
|
|
|
845 else
|
|
|
846 chain = list1 (coding_system);
|
|
|
847 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE))
|
|
|
848 chain = Fcons (Qbinary, chain);
|
|
|
849 wrapper =
|
|
|
850 make_internal_coding_system
|
|
|
851 (coding_system,
|
|
|
852 "internal-text-file-wrapper",
|
|
|
853 Qchain,
|
|
|
854 Qunbound, list4 (Qchain, chain,
|
|
|
855 Qcanonicalize_after_coding, coding_system));
|
|
|
856 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper;
|
|
|
857 }
|
|
|
858 }
|
|
|
859
|
|
|
860 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT)
|
|
|
861 return wrapper;
|
|
|
862
|
|
|
863 coding_system = wrapper;
|
|
|
864 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system);
|
|
|
865 if (!NILP (wrapper))
|
|
|
866 return wrapper;
|
|
|
867 wrapper =
|
|
|
868 make_internal_coding_system
|
|
|
869 (coding_system,
|
|
|
870 "internal-auto-eol-wrapper",
|
|
|
871 Qundecided, Qunbound,
|
|
|
872 list4 (Qcoding_system, coding_system,
|
|
|
873 Qdo_eol, Qt));
|
|
|
874 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper;
|
|
|
875 return wrapper;
|
|
|
876 }
|
|
|
877
|
|
|
878 /* Like Fget_coding_system() but verify that the coding system is of the
|
|
|
879 "standard" type that decodes bytes into characters (suitable for
|
|
|
880 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
881 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
882 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
883 system to do this. */
|
|
|
884
|
|
|
885 Lisp_Object
|
|
|
886 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
887 {
|
|
|
888 Lisp_Object coding_system = find_coding_system_for_text_file (name,
|
|
|
889 eol_wrap);
|
|
|
890 if (NILP (coding_system))
|
|
|
891 invalid_argument ("No such coding system", name);
|
|
|
892 return coding_system;
|
|
|
893 }
|
|
|
894
|
|
|
895 /* We store the coding systems in hash tables with the names as the
|
|
|
896 key and the actual coding system object as the value. Occasionally
|
|
|
897 we need to use them in a list format. These routines provide us
|
|
|
898 with that. */
|
|
428
|
899 struct coding_system_list_closure
|
|
|
900 {
|
|
|
901 Lisp_Object *coding_system_list;
|
|
771
|
902 int normal;
|
|
|
903 int internal;
|
|
428
|
904 };
|
|
|
905
|
|
|
906 static int
|
|
|
907 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
|
908 void *coding_system_list_closure)
|
|
|
909 {
|
|
|
910 /* This function can GC */
|
|
|
911 struct coding_system_list_closure *cscl =
|
|
|
912 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
|
913 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
914
|
|
771
|
915 /* We can't just use VALUE because KEY might be an alias, and we need
|
|
|
916 the real coding system object. */
|
|
|
917 if (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ?
|
|
|
918 cscl->internal : cscl->normal)
|
|
|
919 *coding_system_list = Fcons (key, *coding_system_list);
|
|
428
|
920 return 0;
|
|
|
921 }
|
|
|
922
|
|
771
|
923 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /*
|
|
428
|
924 Return a list of the names of all defined coding systems.
|
|
771
|
925 If INTERNAL is nil, only the normal (non-internal) coding systems are
|
|
|
926 included. (Internal coding systems are created for various internal
|
|
|
927 purposes, such as implementing EOL types of CRLF and CR; generally, you do
|
|
|
928 not want to see these.) If it is t, only the internal coding systems are
|
|
|
929 included. If it is any other non-nil value both normal and internal are
|
|
|
930 included.
|
|
428
|
931 */
|
|
771
|
932 (internal))
|
|
428
|
933 {
|
|
|
934 Lisp_Object coding_system_list = Qnil;
|
|
|
935 struct gcpro gcpro1;
|
|
|
936 struct coding_system_list_closure coding_system_list_closure;
|
|
|
937
|
|
|
938 GCPRO1 (coding_system_list);
|
|
|
939 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
771
|
940 coding_system_list_closure.normal = !EQ (internal, Qt);
|
|
|
941 coding_system_list_closure.internal = !NILP (internal);
|
|
428
|
942 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
|
943 &coding_system_list_closure);
|
|
|
944 UNGCPRO;
|
|
|
945
|
|
|
946 return coding_system_list;
|
|
|
947 }
|
|
|
948
|
|
|
949 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
950 Return the name of the given coding system.
|
|
|
951 */
|
|
|
952 (coding_system))
|
|
|
953 {
|
|
|
954 coding_system = Fget_coding_system (coding_system);
|
|
|
955 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
956 }
|
|
|
957
|
|
|
958 static Lisp_Coding_System *
|
|
771
|
959 allocate_coding_system (struct coding_system_methods *codesys_meths,
|
|
|
960 Bytecount data_size,
|
|
|
961 Lisp_Object name)
|
|
428
|
962 {
|
|
771
|
963 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size;
|
|
428
|
964 Lisp_Coding_System *codesys =
|
|
771
|
965 (Lisp_Coding_System *) alloc_lcrecord (total_size, &lrecord_coding_system);
|
|
|
966
|
|
|
967 zero_sized_lcrecord (codesys, total_size);
|
|
|
968 codesys->methods = codesys_meths;
|
|
428
|
969 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
970 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
771
|
971 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF;
|
|
428
|
972 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
973 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
974 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
771
|
975 CODING_SYSTEM_SUBSIDIARY_PARENT (codesys) = Qnil;
|
|
|
976 CODING_SYSTEM_CANONICAL (codesys) = Qnil;
|
|
428
|
977 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
771
|
978 CODING_SYSTEM_DOCUMENTATION (codesys) = Qnil;
|
|
|
979 CODING_SYSTEM_TEXT_FILE_WRAPPER (codesys) = Qnil;
|
|
|
980 CODING_SYSTEM_AUTO_EOL_WRAPPER (codesys) = Qnil;
|
|
|
981 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
982
|
|
|
983 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys)));
|
|
428
|
984
|
|
|
985 return codesys;
|
|
|
986 }
|
|
|
987
|
|
771
|
988 static enum eol_type
|
|
|
989 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
990 {
|
|
|
991 CHECK_SYMBOL (symbol);
|
|
|
992 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
993 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
994 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
995 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
996
|
|
|
997 invalid_constant ("Unrecognized eol type", symbol);
|
|
801
|
998 RETURN_NOT_REACHED (EOL_AUTODETECT)
|
|
771
|
999 }
|
|
|
1000
|
|
|
1001 static Lisp_Object
|
|
|
1002 eol_type_to_symbol (enum eol_type type)
|
|
|
1003 {
|
|
|
1004 switch (type)
|
|
|
1005 {
|
|
|
1006 default: abort ();
|
|
|
1007 case EOL_LF: return Qlf;
|
|
|
1008 case EOL_CRLF: return Qcrlf;
|
|
|
1009 case EOL_CR: return Qcr;
|
|
|
1010 case EOL_AUTODETECT: return Qnil;
|
|
|
1011 }
|
|
|
1012 }
|
|
|
1013
|
|
|
1014 struct subsidiary_type
|
|
|
1015 {
|
|
|
1016 Char_ASCII *extension;
|
|
|
1017 Char_ASCII *mnemonic_ext;
|
|
|
1018 enum eol_type eol;
|
|
|
1019 };
|
|
|
1020
|
|
|
1021 static struct subsidiary_type coding_subsidiary_list[] =
|
|
|
1022 { { "-unix", "", EOL_LF },
|
|
|
1023 { "-dos", ":T", EOL_CRLF },
|
|
|
1024 { "-mac", ":t", EOL_CR } };
|
|
|
1025
|
|
|
1026 /* kludge */
|
|
428
|
1027 static void
|
|
771
|
1028 setup_eol_coding_systems (Lisp_Object codesys)
|
|
428
|
1029 {
|
|
793
|
1030 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name);
|
|
867
|
1031 Ibyte *codesys_name = (Ibyte *) ALLOCA (len + 7);
|
|
771
|
1032 int mlen = -1;
|
|
867
|
1033 Ibyte *codesys_mnemonic = 0;
|
|
771
|
1034 Lisp_Object codesys_name_sym, sub_codesys;
|
|
|
1035 int i;
|
|
|
1036
|
|
|
1037 memcpy (codesys_name,
|
|
793
|
1038 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len);
|
|
771
|
1039
|
|
|
1040 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys)))
|
|
428
|
1041 {
|
|
771
|
1042 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys));
|
|
867
|
1043 codesys_mnemonic = (Ibyte *) ALLOCA (mlen + 7);
|
|
771
|
1044 memcpy (codesys_mnemonic,
|
|
|
1045 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
1046 }
|
|
|
1047
|
|
|
1048 /* Create three "subsidiary" coding systems, decoding data encoded using
|
|
|
1049 each of the three EOL types. We do this for each subsidiary by
|
|
|
1050 copying the original coding system, setting the EOL type
|
|
|
1051 appropriately, and setting the CANONICAL member of the new coding
|
|
|
1052 system to be a chain consisting of the original coding system followed
|
|
|
1053 by a convert-eol coding system to do the EOL decoding. For EOL type
|
|
|
1054 LF, however, we don't need any decoding, so we skip creating a
|
|
|
1055 CANONICAL.
|
|
|
1056
|
|
|
1057 If the original coding system is not a text-type coding system
|
|
|
1058 (decodes byte->char), we need to coerce it to one by the appropriate
|
|
|
1059 wrapping in CANONICAL. */
|
|
|
1060
|
|
|
1061 for (i = 0; i < countof (coding_subsidiary_list); i++)
|
|
|
1062 {
|
|
|
1063 Char_ASCII *extension = coding_subsidiary_list[i].extension;
|
|
|
1064 Char_ASCII *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext;
|
|
|
1065 enum eol_type eol = coding_subsidiary_list[i].eol;
|
|
|
1066
|
|
|
1067 qxestrcpy_c (codesys_name + len, extension);
|
|
|
1068 codesys_name_sym = intern_int (codesys_name);
|
|
|
1069 if (mlen != -1)
|
|
|
1070 qxestrcpy_c (codesys_mnemonic + mlen, mnemonic_ext);
|
|
|
1071
|
|
|
1072 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym);
|
|
|
1073 if (mlen != -1)
|
|
|
1074 XCODING_SYSTEM_MNEMONIC (sub_codesys) =
|
|
|
1075 build_intstring (codesys_mnemonic);
|
|
|
1076
|
|
|
1077 if (eol != EOL_LF)
|
|
|
1078 {
|
|
|
1079 Lisp_Object chain = list2 (get_coding_system_for_text_file
|
|
|
1080 (codesys, 0),
|
|
|
1081 eol == EOL_CR ? Qconvert_eol_cr :
|
|
|
1082 Qconvert_eol_crlf);
|
|
|
1083 Lisp_Object canon =
|
|
|
1084 make_internal_coding_system
|
|
|
1085 (sub_codesys, "internal-subsidiary-eol-wrapper",
|
|
|
1086 Qchain, Qunbound,
|
|
|
1087 mlen != -1 ?
|
|
|
1088 list6 (Qmnemonic, build_intstring (codesys_mnemonic),
|
|
|
1089 Qchain, chain,
|
|
|
1090 Qcanonicalize_after_coding, sub_codesys) :
|
|
|
1091 list4 (Qchain, chain,
|
|
|
1092 Qcanonicalize_after_coding, sub_codesys));
|
|
|
1093 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon;
|
|
|
1094 }
|
|
|
1095 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol;
|
|
|
1096 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys;
|
|
|
1097 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys;
|
|
428
|
1098 }
|
|
|
1099 }
|
|
|
1100
|
|
771
|
1101 /* Basic function to create new coding systems. For `make-coding-system',
|
|
|
1102 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE,
|
|
|
1103 DESCRIPTION, and PROPS are the same. All created coding systems are put
|
|
|
1104 in a hash table indexed by NAME.
|
|
|
1105
|
|
|
1106 If PREFIX is a string, NAME-OR-EXISTING should specify an existing
|
|
|
1107 coding system (or nil), and an internal coding system will be created.
|
|
|
1108 The name of the coding system will be constructed by combining PREFIX
|
|
|
1109 with the name of the existing coding system (if given), and a number
|
|
|
1110 will be appended to insure uniqueness. In such a case, if Qunbound is
|
|
|
1111 given for DESCRIPTION, the description gets created based on the
|
|
|
1112 generated name. Also, if no mnemonic is given in the properties list, a
|
|
|
1113 mnemonic is created based on the generated name.
|
|
|
1114
|
|
|
1115 For internal coding systems, the coding system is marked as internal
|
|
|
1116 (see `coding-system-list'), and no subsidiaries will be created or
|
|
|
1117 eol-wrapping will happen. Otherwise:
|
|
|
1118
|
|
|
1119 -- if the eol-type property is `lf' or t, the coding system is merely
|
|
|
1120 created and returned. (For t, the coding system will be wrapped with
|
|
|
1121 an EOL autodetector when it's used to read a file.)
|
|
|
1122
|
|
|
1123 -- if eol-type is `crlf' or `cr', after the coding system object is
|
|
|
1124 created, it will be wrapped in a chain with the appropriate
|
|
|
1125 convert-eol coding system (either `convert-eol-crlf' or
|
|
|
1126 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at
|
|
|
1127 decoding time, and the opposite at encoding time. The resulting
|
|
|
1128 chain becomes the CANONICAL field of the coding system object.
|
|
|
1129
|
|
|
1130 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three
|
|
|
1131 coding systems where the original coding system (before wrapping with
|
|
|
1132 convert-eol-autodetect) is either unwrapped or wrapped with
|
|
|
1133 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems
|
|
|
1134 to handle LF, CRLF, and CR end-of-line indicators are created. (This
|
|
|
1135 crazy crap is based on existing behavior in other Mule versions,
|
|
|
1136 including FSF Emacs.)
|
|
|
1137 */
|
|
428
|
1138
|
|
|
1139 static Lisp_Object
|
|
771
|
1140 make_coding_system_1 (Lisp_Object name_or_existing, Char_ASCII *prefix,
|
|
|
1141 Lisp_Object type, Lisp_Object description,
|
|
|
1142 Lisp_Object props)
|
|
428
|
1143 {
|
|
771
|
1144 Lisp_Coding_System *cs;
|
|
|
1145 int need_to_setup_eol_systems = 1;
|
|
|
1146 enum eol_type eol_wrapper = EOL_AUTODETECT;
|
|
|
1147 struct coding_system_methods *meths;
|
|
|
1148 Lisp_Object csobj;
|
|
|
1149 Lisp_Object defmnem = Qnil;
|
|
|
1150
|
|
|
1151 if (NILP (type))
|
|
|
1152 type = Qundecided;
|
|
|
1153 meths = decode_coding_system_type (type, ERROR_ME);
|
|
|
1154
|
|
|
1155 if (prefix)
|
|
428
|
1156 {
|
|
867
|
1157 Ibyte *newname =
|
|
771
|
1158 emacs_sprintf_malloc (NULL, "%s-%s-%d",
|
|
|
1159 prefix,
|
|
867
|
1160 NILP (name_or_existing) ? (Ibyte *) "nil" :
|
|
771
|
1161 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME
|
|
|
1162 (name_or_existing))),
|
|
|
1163 ++coding_system_tick);
|
|
|
1164 name_or_existing = intern_int (newname);
|
|
|
1165 xfree (newname);
|
|
|
1166
|
|
|
1167 if (UNBOUNDP (description))
|
|
|
1168 {
|
|
|
1169 newname =
|
|
|
1170 emacs_sprintf_malloc
|
|
|
1171 (NULL, "For Internal Use (%s)",
|
|
|
1172 XSTRING_DATA (Fsymbol_name (name_or_existing)));
|
|
|
1173 description = build_intstring (newname);
|
|
|
1174 xfree (newname);
|
|
|
1175 }
|
|
|
1176
|
|
|
1177 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick);
|
|
|
1178 defmnem = build_intstring (newname);
|
|
945
|
1179 xfree (newname);
|
|
428
|
1180 }
|
|
771
|
1181 else
|
|
|
1182 CHECK_SYMBOL (name_or_existing);
|
|
|
1183
|
|
|
1184 if (!NILP (Ffind_coding_system (name_or_existing)))
|
|
|
1185 invalid_operation ("Cannot redefine existing coding system",
|
|
|
1186 name_or_existing);
|
|
|
1187
|
|
|
1188 cs = allocate_coding_system (meths, meths->extra_data_size,
|
|
|
1189 name_or_existing);
|
|
793
|
1190 csobj = wrap_coding_system (cs);
|
|
771
|
1191
|
|
|
1192 cs->internal_p = !!prefix;
|
|
|
1193
|
|
|
1194 if (NILP (description))
|
|
|
1195 description = build_string ("");
|
|
|
1196 else
|
|
|
1197 CHECK_STRING (description);
|
|
|
1198 CODING_SYSTEM_DESCRIPTION (cs) = description;
|
|
|
1199
|
|
|
1200 if (!NILP (defmnem))
|
|
|
1201 CODING_SYSTEM_MNEMONIC (cs) = defmnem;
|
|
|
1202
|
|
|
1203 {
|
|
|
1204 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props)
|
|
|
1205 {
|
|
|
1206 int recognized = 1;
|
|
|
1207
|
|
|
1208 if (EQ (key, Qmnemonic))
|
|
|
1209 {
|
|
|
1210 if (!NILP (value))
|
|
|
1211 CHECK_STRING (value);
|
|
|
1212 CODING_SYSTEM_MNEMONIC (cs) = value;
|
|
|
1213 }
|
|
|
1214
|
|
|
1215 else if (EQ (key, Qdocumentation))
|
|
|
1216 {
|
|
|
1217 if (!NILP (value))
|
|
|
1218 CHECK_STRING (value);
|
|
|
1219 CODING_SYSTEM_DOCUMENTATION (cs) = value;
|
|
|
1220 }
|
|
|
1221
|
|
|
1222 else if (EQ (key, Qeol_type))
|
|
|
1223 {
|
|
|
1224 need_to_setup_eol_systems = NILP (value);
|
|
|
1225 if (EQ (value, Qt))
|
|
|
1226 value = Qnil;
|
|
|
1227 eol_wrapper = symbol_to_eol_type (value);
|
|
|
1228 }
|
|
|
1229
|
|
|
1230 else if (EQ (key, Qpost_read_conversion))
|
|
|
1231 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value;
|
|
|
1232 else if (EQ (key, Qpre_write_conversion))
|
|
|
1233 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value;
|
|
|
1234 /* FSF compatibility */
|
|
|
1235 else if (EQ (key, Qtranslation_table_for_decode))
|
|
|
1236 ;
|
|
|
1237 else if (EQ (key, Qtranslation_table_for_encode))
|
|
|
1238 ;
|
|
|
1239 else if (EQ (key, Qsafe_chars))
|
|
|
1240 ;
|
|
|
1241 else if (EQ (key, Qsafe_charsets))
|
|
|
1242 ;
|
|
|
1243 else if (EQ (key, Qmime_charset))
|
|
|
1244 ;
|
|
|
1245 else if (EQ (key, Qvalid_codes))
|
|
|
1246 ;
|
|
|
1247 else
|
|
|
1248 recognized = CODESYSMETH_OR_GIVEN (cs, putprop,
|
|
|
1249 (csobj, key, value), 0);
|
|
|
1250
|
|
|
1251 if (!recognized)
|
|
|
1252 invalid_constant ("Unrecognized property", key);
|
|
|
1253 }
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 {
|
|
|
1257 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
1258 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil);
|
|
|
1259 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system
|
|
|
1260 below */
|
|
|
1261
|
|
|
1262 if (need_to_setup_eol_systems && !cs->internal_p)
|
|
|
1263 setup_eol_coding_systems (csobj);
|
|
|
1264 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF)
|
|
|
1265 {
|
|
|
1266 /* If a specific eol-type (other than LF) was specified, we handle
|
|
|
1267 this by converting the coding system into a chain that wraps the
|
|
|
1268 coding system along with a convert-eol system after it, in
|
|
|
1269 exactly that same switcheroo fashion that the normal
|
|
|
1270 canonicalize method works -- BUT we will run into a problem if
|
|
|
1271 we do it the obvious way, because when `chain' creates its
|
|
|
1272 substreams, the substream containing the coding system we're
|
|
|
1273 creating will have canonicalization expansion done on it,
|
|
|
1274 leading to infinite recursion. So we have to generate a new,
|
|
|
1275 internal coding system with the previous value of CANONICAL. */
|
|
867
|
1276 Ibyte *newname =
|
|
771
|
1277 emacs_sprintf_malloc
|
|
|
1278 (NULL, "internal-eol-copy-%s-%d",
|
|
|
1279 XSTRING_DATA (Fsymbol_name (name_or_existing)),
|
|
|
1280 ++coding_system_tick);
|
|
|
1281 Lisp_Object newnamesym = intern_int (newname);
|
|
|
1282 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym);
|
|
|
1283 xfree (newname);
|
|
|
1284
|
|
|
1285 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
1286 make_internal_coding_system
|
|
|
1287 (csobj,
|
|
|
1288 "internal-eol-wrapper",
|
|
|
1289 Qchain, Qunbound,
|
|
|
1290 list4 (Qchain,
|
|
|
1291 list2 (copied,
|
|
|
1292 eol_wrapper == EOL_CR ?
|
|
|
1293 Qconvert_eol_cr :
|
|
|
1294 Qconvert_eol_crlf),
|
|
|
1295 Qcanonicalize_after_coding,
|
|
|
1296 csobj));
|
|
|
1297 }
|
|
|
1298 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper;
|
|
|
1299 }
|
|
|
1300
|
|
|
1301 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table);
|
|
|
1302
|
|
|
1303 return csobj;
|
|
428
|
1304 }
|
|
|
1305
|
|
771
|
1306 Lisp_Object
|
|
|
1307 make_internal_coding_system (Lisp_Object existing, Char_ASCII *prefix,
|
|
|
1308 Lisp_Object type, Lisp_Object description,
|
|
|
1309 Lisp_Object props)
|
|
|
1310 {
|
|
|
1311 return make_coding_system_1 (existing, prefix, type, description, props);
|
|
|
1312 }
|
|
428
|
1313
|
|
|
1314 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
1315 Register symbol NAME as a coding system.
|
|
|
1316
|
|
|
1317 TYPE describes the conversion method used and should be one of
|
|
|
1318
|
|
|
1319 nil or 'undecided
|
|
|
1320 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
1321 used in the file.
|
|
771
|
1322 'chain
|
|
|
1323 Chain two or more coding systems together to make a combination coding
|
|
|
1324 system.
|
|
428
|
1325 'no-conversion
|
|
|
1326 No conversion. Use this for binary files and such. On output,
|
|
|
1327 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
1328 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
1329 characters will only be present if you explicitly insert them.)
|
|
771
|
1330 'convert-eol
|
|
|
1331 Convert CRLF sequences or CR to LF.
|
|
428
|
1332 'shift-jis
|
|
|
1333 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
771
|
1334 'unicode
|
|
|
1335 Any Unicode encoding (UCS-4, UTF-8, UTF-16, etc.).
|
|
|
1336 'mswindows-unicode-to-multibyte
|
|
|
1337 (MS Windows only) Converts from Windows Unicode to Windows Multibyte
|
|
|
1338 (any code page encoding) upon encoding, and the other way upon decoding.
|
|
|
1339 'mswindows-multibyte
|
|
|
1340 Converts to or from Windows Multibyte (any code page encoding).
|
|
|
1341 This is resolved into a chain of `mswindows-unicode' and
|
|
|
1342 `mswindows-unicode-to-multibyte'.
|
|
428
|
1343 'iso2022
|
|
|
1344 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
1345 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
1346 standard Unix encoding for Japanese and other languages), and
|
|
|
1347 Compound Text (the encoding used in X11). You can specify more
|
|
442
|
1348 specific information about the conversion with the PROPS argument.
|
|
428
|
1349 'big5
|
|
|
1350 Big5 (the encoding commonly used for Taiwanese).
|
|
|
1351 'ccl
|
|
|
1352 The conversion is performed using a user-written pseudo-code
|
|
|
1353 program. CCL (Code Conversion Language) is the name of this
|
|
|
1354 pseudo-code.
|
|
771
|
1355 'gzip
|
|
|
1356 GZIP compression format.
|
|
428
|
1357 'internal
|
|
|
1358 Write out or read in the raw contents of the memory representing
|
|
|
1359 the buffer's text. This is primarily useful for debugging
|
|
|
1360 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
1361 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
1362 WARNING: Reading in a file using 'internal conversion can result
|
|
|
1363 in an internal inconsistency in the memory representing a
|
|
|
1364 buffer's text, which will produce unpredictable results and may
|
|
|
1365 cause XEmacs to crash. Under normal circumstances you should
|
|
|
1366 never use 'internal conversion.
|
|
|
1367
|
|
771
|
1368 DESCRIPTION is a short English phrase describing the coding system,
|
|
|
1369 suitable for use as a menu item. (See also the `documentation' property
|
|
|
1370 below.)
|
|
428
|
1371
|
|
|
1372 PROPS is a property list, describing the specific nature of the
|
|
|
1373 character set. Recognized properties are:
|
|
|
1374
|
|
|
1375 'mnemonic
|
|
|
1376 String to be displayed in the modeline when this coding system is
|
|
|
1377 active.
|
|
|
1378
|
|
771
|
1379 'documentation
|
|
|
1380 Detailed documentation on the coding system.
|
|
|
1381
|
|
428
|
1382 'eol-type
|
|
|
1383 End-of-line conversion to be used. It should be one of
|
|
|
1384
|
|
|
1385 nil
|
|
|
1386 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
1387 or CR). Also generate subsidiary coding systems named
|
|
|
1388 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
1389 identical to this coding system but have an EOL-TYPE
|
|
|
1390 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
1391 'lf
|
|
|
1392 The end of a line is marked externally using ASCII LF.
|
|
|
1393 Since this is also the way that XEmacs represents an
|
|
|
1394 end-of-line internally, specifying this option results
|
|
|
1395 in no end-of-line conversion. This is the standard
|
|
|
1396 format for Unix text files.
|
|
|
1397 'crlf
|
|
|
1398 The end of a line is marked externally using ASCII
|
|
|
1399 CRLF. This is the standard format for MS-DOS text
|
|
|
1400 files.
|
|
|
1401 'cr
|
|
|
1402 The end of a line is marked externally using ASCII CR.
|
|
|
1403 This is the standard format for Macintosh text files.
|
|
|
1404 t
|
|
|
1405 Automatically detect the end-of-line type but do not
|
|
|
1406 generate subsidiary coding systems. (This value is
|
|
|
1407 converted to nil when stored internally, and
|
|
|
1408 `coding-system-property' will return nil.)
|
|
|
1409
|
|
|
1410 'post-read-conversion
|
|
771
|
1411 The value is a function to call after some text is inserted and
|
|
|
1412 decoded by the coding system itself and before any functions in
|
|
|
1413 `after-change-functions' are called. (#### Not actually true in
|
|
|
1414 XEmacs. `after-change-functions' will be called twice if
|
|
|
1415 `post-read-conversion' changes something.) The argument of this
|
|
|
1416 function is the same as for a function in
|
|
|
1417 `after-insert-file-functions', i.e. LENGTH of the text inserted,
|
|
|
1418 with point at the head of the text to be decoded.
|
|
428
|
1419
|
|
|
1420 'pre-write-conversion
|
|
771
|
1421 The value is a function to call after all functions in
|
|
|
1422 `write-region-annotate-functions' and `buffer-file-format' are
|
|
|
1423 called, and before the text is encoded by the coding system itself.
|
|
|
1424 The arguments to this function are the same as those of a function
|
|
|
1425 in `write-region-annotate-functions', i.e. FROM and TO, specifying
|
|
|
1426 a region of text.
|
|
|
1427
|
|
|
1428
|
|
|
1429
|
|
|
1430 The following properties are allowed for FSF compatibility but currently
|
|
|
1431 ignored:
|
|
|
1432
|
|
|
1433 'translation-table-for-decode
|
|
|
1434 The value is a translation table to be applied on decoding. See
|
|
|
1435 the function `make-translation-table' for the format of translation
|
|
|
1436 table. This is not applicable to CCL-based coding systems.
|
|
|
1437
|
|
|
1438 'translation-table-for-encode
|
|
|
1439 The value is a translation table to be applied on encoding. This is
|
|
|
1440 not applicable to CCL-based coding systems.
|
|
|
1441
|
|
|
1442 'safe-chars
|
|
|
1443 The value is a char table. If a character has non-nil value in it,
|
|
|
1444 the character is safely supported by the coding system. This
|
|
|
1445 overrides the specification of safe-charsets.
|
|
|
1446
|
|
|
1447 'safe-charsets
|
|
|
1448 The value is a list of charsets safely supported by the coding
|
|
|
1449 system. The value t means that all charsets Emacs handles are
|
|
|
1450 supported. Even if some charset is not in this list, it doesn't
|
|
|
1451 mean that the charset can't be encoded in the coding system;
|
|
|
1452 it just means that some other receiver of text encoded
|
|
|
1453 in the coding system won't be able to handle that charset.
|
|
|
1454
|
|
|
1455 'mime-charset
|
|
|
1456 The value is a symbol of which name is `MIME-charset' parameter of
|
|
|
1457 the coding system.
|
|
|
1458
|
|
|
1459 'valid-codes (meaningful only for a coding system based on CCL)
|
|
|
1460 The value is a list to indicate valid byte ranges of the encoded
|
|
|
1461 file. Each element of the list is an integer or a cons of integer.
|
|
|
1462 In the former case, the integer value is a valid byte code. In the
|
|
|
1463 latter case, the integers specifies the range of valid byte codes.
|
|
|
1464
|
|
|
1465
|
|
|
1466
|
|
|
1467 The following additional property is recognized if TYPE is 'convert-eol:
|
|
|
1468
|
|
|
1469 'subtype
|
|
793
|
1470 One of `lf', `crlf', `cr' or nil (for autodetection). When decoding,
|
|
|
1471 the corresponding sequence will be converted to LF. When encoding,
|
|
|
1472 the opposite happens. This coding system converts characters to
|
|
771
|
1473 characters.
|
|
|
1474
|
|
428
|
1475
|
|
|
1476
|
|
|
1477 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
1478
|
|
|
1479 'charset-g0
|
|
|
1480 'charset-g1
|
|
|
1481 'charset-g2
|
|
|
1482 'charset-g3
|
|
|
1483 The character set initially designated to the G0 - G3 registers.
|
|
|
1484 The value should be one of
|
|
|
1485
|
|
|
1486 -- A charset object (designate that character set)
|
|
|
1487 -- nil (do not ever use this register)
|
|
|
1488 -- t (no character set is initially designated to
|
|
|
1489 the register, but may be later on; this automatically
|
|
|
1490 sets the corresponding `force-g*-on-output' property)
|
|
|
1491
|
|
|
1492 'force-g0-on-output
|
|
|
1493 'force-g1-on-output
|
|
|
1494 'force-g2-on-output
|
|
|
1495 'force-g2-on-output
|
|
|
1496 If non-nil, send an explicit designation sequence on output before
|
|
|
1497 using the specified register.
|
|
|
1498
|
|
|
1499 'short
|
|
|
1500 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
1501 "ESC $ B" on output in place of the full designation sequences
|
|
|
1502 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
1503
|
|
|
1504 'no-ascii-eol
|
|
|
1505 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
1506 Setting this to non-nil also suppresses other state-resetting that
|
|
|
1507 normally happens at the end of a line.
|
|
|
1508
|
|
|
1509 'no-ascii-cntl
|
|
|
1510 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
1511
|
|
|
1512 'seven
|
|
|
1513 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
1514 environment.
|
|
|
1515
|
|
|
1516 'lock-shift
|
|
|
1517 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
1518 or designation by escape sequence.
|
|
|
1519
|
|
|
1520 'no-iso6429
|
|
|
1521 If non-nil, don't use ISO6429's direction specification.
|
|
|
1522
|
|
|
1523 'escape-quoted
|
|
|
1524 If non-nil, literal control characters that are the same as
|
|
|
1525 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
1526 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
1527 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
1528 so that they can be properly distinguished from an escape sequence.
|
|
|
1529 (Note that doing this results in a non-portable encoding.) This
|
|
|
1530 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
1531 is a good choice for a quoting character because there are no
|
|
|
1532 escape sequences whose second byte is a character from the Control-0
|
|
|
1533 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
1534 ISO2022 standard.
|
|
|
1535
|
|
|
1536 'input-charset-conversion
|
|
|
1537 A list of conversion specifications, specifying conversion of
|
|
|
1538 characters in one charset to another when decoding is performed.
|
|
|
1539 Each specification is a list of two elements: the source charset,
|
|
|
1540 and the destination charset.
|
|
|
1541
|
|
|
1542 'output-charset-conversion
|
|
|
1543 A list of conversion specifications, specifying conversion of
|
|
|
1544 characters in one charset to another when encoding is performed.
|
|
|
1545 The form of each specification is the same as for
|
|
|
1546 'input-charset-conversion.
|
|
|
1547
|
|
|
1548
|
|
771
|
1549
|
|
428
|
1550 The following additional properties are recognized (and required)
|
|
|
1551 if TYPE is 'ccl:
|
|
|
1552
|
|
|
1553 'decode
|
|
|
1554 CCL program used for decoding (converting to internal format).
|
|
|
1555
|
|
|
1556 'encode
|
|
|
1557 CCL program used for encoding (converting to external format).
|
|
771
|
1558
|
|
|
1559
|
|
|
1560 The following additional properties are recognized if TYPE is 'chain:
|
|
|
1561
|
|
|
1562 'chain
|
|
|
1563 List of coding systems to be chained together, in decoding order.
|
|
|
1564
|
|
|
1565 'canonicalize-after-coding
|
|
|
1566 Coding system to be returned by the detector routines in place of
|
|
|
1567 this coding system.
|
|
|
1568
|
|
|
1569
|
|
|
1570
|
|
|
1571 The following additional properties are recognized if TYPE is 'unicode:
|
|
|
1572
|
|
|
1573 'type
|
|
|
1574 One of `utf-16', `utf-8', `ucs-4', or `utf-7' (the latter is not
|
|
|
1575 yet implemented). `utf-16' is the basic two-byte encoding;
|
|
|
1576 `ucs-4' is the four-byte encoding; `utf-8' is an ASCII-compatible
|
|
|
1577 variable-width 8-bit encoding; `utf-7' is a 7-bit encoding using
|
|
|
1578 only characters that will safely pass through all mail gateways.
|
|
|
1579
|
|
|
1580 'little-endian
|
|
|
1581 If non-nil, `utf-16' and `ucs-4' will write out the groups of two
|
|
|
1582 or four bytes little-endian instead of big-endian. This is required,
|
|
|
1583 for example, under Windows.
|
|
|
1584
|
|
|
1585 'need-bom
|
|
|
1586 If non-nil, a byte order mark (BOM, or Unicode FFFE) should be
|
|
|
1587 written out at the beginning of the data. This serves both to
|
|
|
1588 identify the endianness of the following data and to mark the
|
|
|
1589 data as Unicode (at least, this is how Windows uses it).
|
|
|
1590
|
|
|
1591
|
|
|
1592
|
|
|
1593 The following additional properties are recognized if TYPE is
|
|
|
1594 'mswindows-multibyte:
|
|
|
1595
|
|
|
1596 'code-page
|
|
|
1597 Either a number (specifying a particular code page) or one of the
|
|
|
1598 symbols `ansi', `oem', `mac', or `ebcdic', specifying the ANSI,
|
|
|
1599 OEM, Macintosh, or EBCDIC code page associated with a particular
|
|
|
1600 locale (given by the `locale' property). NOTE: EBCDIC code pages
|
|
|
1601 only exist in Windows 2000 and later.
|
|
|
1602
|
|
|
1603 'locale
|
|
|
1604 If `code-page' is a symbol, this specifies the locale whose code
|
|
|
1605 page of the corresponding type should be used. This should be
|
|
|
1606 one of the following: A cons of two strings, (LANGUAGE
|
|
|
1607 . SUBLANGUAGE) (see `mswindows-set-current-locale'); a string (a
|
|
|
1608 language; SUBLANG_DEFAULT, i.e. the default sublanguage, is
|
|
|
1609 used); or one of the symbols `current', `user-default', or
|
|
|
1610 `system-default', corresponding to the values of
|
|
|
1611 `mswindows-current-locale', `mswindows-user-default-locale', or
|
|
|
1612 `mswindows-system-default-locale', respectively.
|
|
|
1613
|
|
|
1614
|
|
|
1615
|
|
|
1616 The following additional properties are recognized if TYPE is 'undecided:
|
|
|
1617
|
|
|
1618 'do-eol
|
|
|
1619 Do EOL detection.
|
|
|
1620
|
|
|
1621 'do-coding
|
|
|
1622 Do encoding detection.
|
|
|
1623
|
|
|
1624 'coding-system
|
|
|
1625 If encoding detection is not done, use the specified coding system
|
|
|
1626 to do decoding. This is used internally when implementing coding
|
|
|
1627 systems with an EOL type that specifies autodetection (the default),
|
|
|
1628 so that the detector routines return the proper subsidiary.
|
|
|
1629
|
|
|
1630
|
|
|
1631
|
|
|
1632 The following additional property is recognized if TYPE is 'gzip:
|
|
|
1633
|
|
|
1634 'level
|
|
|
1635 Compression level: 0 through 9, or `default' (currently 6).
|
|
|
1636
|
|
428
|
1637 */
|
|
771
|
1638 (name, type, description, props))
|
|
428
|
1639 {
|
|
771
|
1640 return make_coding_system_1 (name, 0, type, description, props);
|
|
428
|
1641 }
|
|
|
1642
|
|
|
1643 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
1644 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1645 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1646 be created.
|
|
771
|
1647 If you are using this function to create an alias, think again:
|
|
|
1648 Use `define-coding-system-alias' instead.
|
|
428
|
1649 */
|
|
|
1650 (old_coding_system, new_name))
|
|
|
1651 {
|
|
|
1652 Lisp_Object new_coding_system;
|
|
|
1653 old_coding_system = Fget_coding_system (old_coding_system);
|
|
771
|
1654 new_coding_system =
|
|
|
1655 UNBOUNDP (new_name) ? Qnil : Ffind_coding_system (new_name);
|
|
428
|
1656 if (NILP (new_coding_system))
|
|
|
1657 {
|
|
793
|
1658 new_coding_system =
|
|
|
1659 wrap_coding_system
|
|
|
1660 (allocate_coding_system
|
|
|
1661 (XCODING_SYSTEM (old_coding_system)->methods,
|
|
|
1662 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size,
|
|
|
1663 new_name));
|
|
771
|
1664 if (!UNBOUNDP (new_name))
|
|
|
1665 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
428
|
1666 }
|
|
771
|
1667 else if (XCODING_SYSTEM (old_coding_system)->methods !=
|
|
|
1668 XCODING_SYSTEM (new_coding_system)->methods)
|
|
|
1669 invalid_operation_2 ("Coding systems not same type",
|
|
|
1670 old_coding_system, new_coding_system);
|
|
428
|
1671
|
|
|
1672 {
|
|
|
1673 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1674 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
771
|
1675 copy_sized_lcrecord (to, from, sizeof_coding_system (from));
|
|
428
|
1676 to->name = new_name;
|
|
|
1677 }
|
|
|
1678 return new_coding_system;
|
|
|
1679 }
|
|
|
1680
|
|
771
|
1681 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p,
|
|
|
1682 1, 1, 0, /*
|
|
440
|
1683 Return t if OBJECT names a coding system, and is not a coding system alias.
|
|
428
|
1684 */
|
|
440
|
1685 (object))
|
|
|
1686 {
|
|
|
1687 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
|
|
|
1688 ? Qt : Qnil;
|
|
|
1689 }
|
|
|
1690
|
|
|
1691 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
|
|
|
1692 Return t if OBJECT is a coding system alias.
|
|
|
1693 All coding system aliases are created by `define-coding-system-alias'.
|
|
|
1694 */
|
|
|
1695 (object))
|
|
428
|
1696 {
|
|
440
|
1697 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
|
|
|
1698 ? Qt : Qnil;
|
|
|
1699 }
|
|
|
1700
|
|
|
1701 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
|
|
|
1702 Return the coding-system symbol for which symbol ALIAS is an alias.
|
|
|
1703 */
|
|
|
1704 (alias))
|
|
|
1705 {
|
|
|
1706 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
|
|
|
1707 if (SYMBOLP (aliasee))
|
|
|
1708 return aliasee;
|
|
|
1709 else
|
|
563
|
1710 invalid_argument ("Symbol is not a coding system alias", alias);
|
|
801
|
1711 RETURN_NOT_REACHED (Qnil)
|
|
440
|
1712 }
|
|
|
1713
|
|
|
1714 /* A maphash function, for removing dangling coding system aliases. */
|
|
|
1715 static int
|
|
|
1716 dangling_coding_system_alias_p (Lisp_Object alias,
|
|
|
1717 Lisp_Object aliasee,
|
|
|
1718 void *dangling_aliases)
|
|
|
1719 {
|
|
|
1720 if (SYMBOLP (aliasee)
|
|
|
1721 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
|
|
428
|
1722 {
|
|
440
|
1723 (*(int *) dangling_aliases)++;
|
|
|
1724 return 1;
|
|
428
|
1725 }
|
|
440
|
1726 else
|
|
|
1727 return 0;
|
|
|
1728 }
|
|
|
1729
|
|
|
1730 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1731 Define symbol ALIAS as an alias for coding system ALIASEE.
|
|
|
1732
|
|
|
1733 You can use this function to redefine an alias that has already been defined,
|
|
|
1734 but you cannot redefine a name which is the canonical name for a coding system.
|
|
|
1735 \(a canonical name of a coding system is what is returned when you call
|
|
|
1736 `coding-system-name' on a coding system).
|
|
|
1737
|
|
|
1738 ALIASEE itself can be an alias, which allows you to define nested aliases.
|
|
|
1739
|
|
|
1740 You are forbidden, however, from creating alias loops or `dangling' aliases.
|
|
|
1741 These will be detected, and an error will be signaled if you attempt to do so.
|
|
|
1742
|
|
|
1743 If ALIASEE is nil, then ALIAS will simply be undefined.
|
|
|
1744
|
|
|
1745 See also `coding-system-alias-p', `coding-system-aliasee',
|
|
|
1746 and `coding-system-canonical-name-p'.
|
|
|
1747 */
|
|
|
1748 (alias, aliasee))
|
|
|
1749 {
|
|
|
1750 Lisp_Object real_coding_system, probe;
|
|
|
1751
|
|
|
1752 CHECK_SYMBOL (alias);
|
|
|
1753
|
|
|
1754 if (!NILP (Fcoding_system_canonical_name_p (alias)))
|
|
563
|
1755 invalid_change
|
|
440
|
1756 ("Symbol is the canonical name of a coding system and cannot be redefined",
|
|
|
1757 alias);
|
|
|
1758
|
|
|
1759 if (NILP (aliasee))
|
|
|
1760 {
|
|
771
|
1761 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix");
|
|
|
1762 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos");
|
|
|
1763 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac");
|
|
440
|
1764
|
|
|
1765 Fremhash (alias, Vcoding_system_hash_table);
|
|
|
1766
|
|
|
1767 /* Undefine subsidiary aliases,
|
|
|
1768 presumably created by a previous call to this function */
|
|
|
1769 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
|
|
|
1770 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
|
|
|
1771 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
|
|
|
1772 {
|
|
|
1773 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
|
|
|
1774 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
|
|
|
1775 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
|
|
|
1776 }
|
|
|
1777
|
|
|
1778 /* Undefine dangling coding system aliases. */
|
|
|
1779 {
|
|
|
1780 int dangling_aliases;
|
|
|
1781
|
|
|
1782 do {
|
|
|
1783 dangling_aliases = 0;
|
|
|
1784 elisp_map_remhash (dangling_coding_system_alias_p,
|
|
|
1785 Vcoding_system_hash_table,
|
|
|
1786 &dangling_aliases);
|
|
|
1787 } while (dangling_aliases > 0);
|
|
|
1788 }
|
|
|
1789
|
|
|
1790 return Qnil;
|
|
|
1791 }
|
|
|
1792
|
|
|
1793 if (CODING_SYSTEMP (aliasee))
|
|
|
1794 aliasee = XCODING_SYSTEM_NAME (aliasee);
|
|
|
1795
|
|
|
1796 /* Checks that aliasee names a coding-system */
|
|
|
1797 real_coding_system = Fget_coding_system (aliasee);
|
|
|
1798
|
|
|
1799 /* Check for coding system alias loops */
|
|
|
1800 if (EQ (alias, aliasee))
|
|
563
|
1801 alias_loop: invalid_operation_2
|
|
440
|
1802 ("Attempt to create a coding system alias loop", alias, aliasee);
|
|
|
1803
|
|
|
1804 for (probe = aliasee;
|
|
|
1805 SYMBOLP (probe);
|
|
|
1806 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
|
|
|
1807 {
|
|
|
1808 if (EQ (probe, alias))
|
|
|
1809 goto alias_loop;
|
|
|
1810 }
|
|
|
1811
|
|
|
1812 Fputhash (alias, aliasee, Vcoding_system_hash_table);
|
|
|
1813
|
|
|
1814 /* Set up aliases for subsidiaries.
|
|
|
1815 #### There must be a better way to handle subsidiary coding systems. */
|
|
|
1816 {
|
|
|
1817 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
|
|
|
1818 int i;
|
|
|
1819 for (i = 0; i < countof (suffixes); i++)
|
|
|
1820 {
|
|
|
1821 Lisp_Object alias_subsidiary =
|
|
771
|
1822 add_suffix_to_symbol (alias, suffixes[i]);
|
|
440
|
1823 Lisp_Object aliasee_subsidiary =
|
|
771
|
1824 add_suffix_to_symbol (aliasee, suffixes[i]);
|
|
440
|
1825
|
|
|
1826 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
|
|
|
1827 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
|
|
|
1828 }
|
|
|
1829 }
|
|
428
|
1830 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1831 but it doesn't look intentional, so I'd rather return something
|
|
|
1832 meaningful or nothing at all. */
|
|
|
1833 return Qnil;
|
|
|
1834 }
|
|
|
1835
|
|
|
1836 static Lisp_Object
|
|
771
|
1837 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
428
|
1838 {
|
|
|
1839 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
1840 Lisp_Object new_coding_system;
|
|
|
1841
|
|
|
1842 switch (type)
|
|
|
1843 {
|
|
|
1844 case EOL_AUTODETECT: return coding_system;
|
|
|
1845 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1846 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1847 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
442
|
1848 default: abort (); return Qnil;
|
|
428
|
1849 }
|
|
|
1850
|
|
|
1851 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1852 }
|
|
|
1853
|
|
|
1854 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1855 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
771
|
1856 The logically opposite operation is `coding-system-base'.
|
|
428
|
1857 */
|
|
|
1858 (coding_system, eol_type))
|
|
|
1859 {
|
|
771
|
1860 coding_system = get_coding_system_for_text_file (coding_system, 0);
|
|
428
|
1861
|
|
|
1862 return subsidiary_coding_system (coding_system,
|
|
|
1863 symbol_to_eol_type (eol_type));
|
|
|
1864 }
|
|
|
1865
|
|
771
|
1866 DEFUN ("coding-system-base", Fcoding_system_base,
|
|
|
1867 1, 1, 0, /*
|
|
|
1868 Return the base coding system of CODING-SYSTEM.
|
|
|
1869 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it
|
|
|
1870 returns CODING-SYSTEM.
|
|
|
1871 The logically opposite operation is `subsidiary-coding-system'.
|
|
|
1872 */
|
|
|
1873 (coding_system))
|
|
|
1874 {
|
|
|
1875 Lisp_Object base;
|
|
|
1876
|
|
|
1877 coding_system = Fget_coding_system (coding_system);
|
|
|
1878 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary))
|
|
|
1879 return Fget_coding_system (Qraw_text); /* hack! */
|
|
|
1880 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system);
|
|
|
1881 if (!NILP (base))
|
|
|
1882 return base;
|
|
|
1883 return coding_system;
|
|
|
1884 }
|
|
|
1885
|
|
|
1886 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io,
|
|
|
1887 1, 1, 0, /*
|
|
|
1888 Return the coding system actually used for I/O.
|
|
|
1889 In some cases (e.g. when a particular EOL type is specified) this won't be
|
|
|
1890 the coding system itself. This can be useful when trying to track down
|
|
|
1891 more closely how exactly data is decoded.
|
|
|
1892 */
|
|
|
1893 (coding_system))
|
|
|
1894 {
|
|
|
1895 Lisp_Object canon;
|
|
|
1896
|
|
|
1897 coding_system = Fget_coding_system (coding_system);
|
|
|
1898 canon = XCODING_SYSTEM_CANONICAL (coding_system);
|
|
|
1899 if (!NILP (canon))
|
|
|
1900 return canon;
|
|
|
1901 return coding_system;
|
|
|
1902 }
|
|
|
1903
|
|
428
|
1904
|
|
|
1905 /************************************************************************/
|
|
|
1906 /* Coding system accessors */
|
|
|
1907 /************************************************************************/
|
|
|
1908
|
|
771
|
1909 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /*
|
|
|
1910 Return the description for CODING-SYSTEM.
|
|
|
1911 The `description' of a coding system is a short English phrase giving the
|
|
|
1912 name rendered according to English punctuation rules, plus possibly some
|
|
|
1913 explanatory text (typically in the form of a parenthetical phrase). The
|
|
|
1914 description is intended to be short enough that it can appear as a menu item,
|
|
|
1915 and clear enough to be recognizable even to someone who is assumed to have
|
|
|
1916 some basic familiarity with different encodings but may not know all the
|
|
|
1917 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and
|
|
|
1918 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of
|
|
|
1919 the encoding is given, followed by a note that this is a Chinese encoding,
|
|
|
1920 because the great majority of people encountering this would have no idea
|
|
|
1921 what it is, and giving the language indicates whether the encoding should
|
|
|
1922 just be ignored or (conceivably) investigated more thoroughly.
|
|
428
|
1923 */
|
|
|
1924 (coding_system))
|
|
|
1925 {
|
|
|
1926 coding_system = Fget_coding_system (coding_system);
|
|
771
|
1927 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1928 }
|
|
|
1929
|
|
|
1930 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1931 Return the type of CODING-SYSTEM.
|
|
|
1932 */
|
|
|
1933 (coding_system))
|
|
|
1934 {
|
|
771
|
1935 coding_system = Fget_coding_system (coding_system);
|
|
|
1936 return XCODING_SYSTEM_TYPE (coding_system);
|
|
428
|
1937 }
|
|
|
1938
|
|
|
1939 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1940 Return the PROP property of CODING-SYSTEM.
|
|
|
1941 */
|
|
|
1942 (coding_system, prop))
|
|
|
1943 {
|
|
|
1944 coding_system = Fget_coding_system (coding_system);
|
|
|
1945 CHECK_SYMBOL (prop);
|
|
|
1946
|
|
|
1947 if (EQ (prop, Qname))
|
|
|
1948 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1949 else if (EQ (prop, Qtype))
|
|
|
1950 return Fcoding_system_type (coding_system);
|
|
771
|
1951 else if (EQ (prop, Qdescription))
|
|
|
1952 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1953 else if (EQ (prop, Qmnemonic))
|
|
|
1954 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
771
|
1955 else if (EQ (prop, Qdocumentation))
|
|
|
1956 return XCODING_SYSTEM_DOCUMENTATION (coding_system);
|
|
428
|
1957 else if (EQ (prop, Qeol_type))
|
|
771
|
1958 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE
|
|
|
1959 (coding_system));
|
|
428
|
1960 else if (EQ (prop, Qeol_lf))
|
|
|
1961 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1962 else if (EQ (prop, Qeol_crlf))
|
|
|
1963 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1964 else if (EQ (prop, Qeol_cr))
|
|
|
1965 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1966 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1967 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1968 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1969 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
771
|
1970 else
|
|
|
1971 {
|
|
|
1972 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system),
|
|
|
1973 getprop,
|
|
|
1974 (coding_system, prop),
|
|
|
1975 Qunbound);
|
|
|
1976 if (UNBOUNDP (value))
|
|
|
1977 invalid_constant ("Unrecognized property", prop);
|
|
|
1978 return value;
|
|
|
1979 }
|
|
|
1980 }
|
|
|
1981
|
|
|
1982
|
|
|
1983 /************************************************************************/
|
|
|
1984 /* Coding stream functions */
|
|
|
1985 /************************************************************************/
|
|
|
1986
|
|
|
1987 /* A coding stream is a stream used for encoding or decoding text. The
|
|
|
1988 coding-stream object keeps track of the actual coding system, the stream
|
|
|
1989 that is at the other end, and data that needs to be persistent across
|
|
|
1990 the lifetime of the stream. */
|
|
|
1991
|
|
|
1992 DEFINE_LSTREAM_IMPLEMENTATION ("coding", coding);
|
|
|
1993
|
|
|
1994 /* Encoding and decoding are parallel operations, so we create just one
|
|
|
1995 stream for both. "Decoding" may involve the extra step of autodetection
|
|
|
1996 of the data format, but that's only because of the conventional
|
|
|
1997 definition of decoding as converting from external- to
|
|
|
1998 internal-formatted data.
|
|
|
1999
|
|
|
2000 #### We really need to abstract out the concept of "data formats" and
|
|
|
2001 define "converters" that convert from and to specified formats,
|
|
|
2002 eliminating the idea of decoding and encoding. When specifying a
|
|
|
2003 conversion process, we need to give the data formats themselves, not the
|
|
|
2004 conversion processes -- e.g. a coding system called "Unicode->multibyte"
|
|
|
2005 converts in both directions, and we could auto-detect the format of data
|
|
|
2006 at either end. */
|
|
|
2007
|
|
|
2008 static Bytecount
|
|
|
2009 coding_reader (Lstream *stream, unsigned char *data, Bytecount size)
|
|
|
2010 {
|
|
|
2011 unsigned char *orig_data = data;
|
|
|
2012 Bytecount read_size;
|
|
|
2013 int error_occurred = 0;
|
|
|
2014 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2015
|
|
|
2016 /* We need to interface to coding_{de,en}code_1(), which expects to take
|
|
|
2017 some amount of data and store the result into a Dynarr. We have
|
|
|
2018 coding_{de,en}code_1() store into c->runoff, and take data from there
|
|
|
2019 as necessary. */
|
|
|
2020
|
|
|
2021 /* We loop until we have enough data, reading chunks from the other
|
|
|
2022 end and converting it. */
|
|
|
2023 while (1)
|
|
|
2024 {
|
|
|
2025 /* Take data from convert_to if we can. Make sure to take at
|
|
|
2026 most SIZE bytes, and delete the data from convert_to. */
|
|
|
2027 if (Dynarr_length (str->convert_to) > 0)
|
|
|
2028 {
|
|
|
2029 Bytecount chunk =
|
|
|
2030 min (size, (Bytecount) Dynarr_length (str->convert_to));
|
|
|
2031 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk);
|
|
|
2032 Dynarr_delete_many (str->convert_to, 0, chunk);
|
|
|
2033 data += chunk;
|
|
|
2034 size -= chunk;
|
|
|
2035 }
|
|
|
2036
|
|
|
2037 if (size == 0)
|
|
|
2038 break; /* No more room for data */
|
|
|
2039
|
|
|
2040 if (str->eof)
|
|
|
2041 break;
|
|
|
2042
|
|
|
2043 {
|
|
|
2044 /* Exhausted convert_to, so get some more. Read into convert_from,
|
|
|
2045 after existing "rejected" data from the last conversion. */
|
|
|
2046 Bytecount rejected = Dynarr_length (str->convert_from);
|
|
|
2047 /* #### 1024 is arbitrary; we really need to separate 0 from EOF,
|
|
|
2048 and when we get 0, keep taking more data until we don't get 0 --
|
|
|
2049 we don't know how much data the conversion routine might need
|
|
|
2050 before it can generate any data of its own */
|
|
814
|
2051 Bytecount readmore =
|
|
|
2052 str->one_byte_at_a_time ? (Bytecount) 1 :
|
|
|
2053 max (size, (Bytecount) 1024);
|
|
771
|
2054
|
|
|
2055 Dynarr_add_many (str->convert_from, 0, readmore);
|
|
|
2056 read_size = Lstream_read (str->other_end,
|
|
|
2057 Dynarr_atp (str->convert_from, rejected),
|
|
|
2058 readmore);
|
|
|
2059 /* Trim size down to how much we actually got */
|
|
|
2060 Dynarr_set_size (str->convert_from, rejected + max (0, read_size));
|
|
|
2061 }
|
|
|
2062
|
|
|
2063 if (read_size < 0) /* LSTREAM_ERROR */
|
|
|
2064 {
|
|
|
2065 error_occurred = 1;
|
|
|
2066 break;
|
|
|
2067 }
|
|
|
2068 if (read_size == 0) /* LSTREAM_EOF */
|
|
|
2069 /* There might be some more end data produced in the translation,
|
|
|
2070 so we set a flag and call the conversion method once more to
|
|
|
2071 output any final stuff it may be holding, any "go back to a sane
|
|
|
2072 state" escape sequences, etc. The conversion method is free to
|
|
|
2073 look at this flag, and we use it above to stop looping. */
|
|
|
2074 str->eof = 1;
|
|
|
2075 {
|
|
|
2076 Bytecount processed;
|
|
|
2077 Bytecount to_process = Dynarr_length (str->convert_from);
|
|
|
2078
|
|
|
2079 /* Convert the data, and save any rejected data in convert_from */
|
|
|
2080 processed =
|
|
|
2081 XCODESYSMETH (str->codesys, convert,
|
|
|
2082 (str, Dynarr_atp (str->convert_from, 0),
|
|
|
2083 str->convert_to, to_process));
|
|
|
2084 if (processed < 0)
|
|
|
2085 {
|
|
|
2086 error_occurred = 1;
|
|
|
2087 break;
|
|
|
2088 }
|
|
|
2089 assert (processed <= to_process);
|
|
|
2090 if (processed < to_process)
|
|
|
2091 memmove (Dynarr_atp (str->convert_from, 0),
|
|
|
2092 Dynarr_atp (str->convert_from, processed),
|
|
|
2093 to_process - processed);
|
|
|
2094 Dynarr_set_size (str->convert_from, to_process - processed);
|
|
|
2095 }
|
|
|
2096 }
|
|
|
2097
|
|
|
2098 if (data - orig_data == 0)
|
|
|
2099 return error_occurred ? -1 : 0;
|
|
|
2100 else
|
|
|
2101 return data - orig_data;
|
|
|
2102 }
|
|
|
2103
|
|
|
2104 static Bytecount
|
|
|
2105 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size)
|
|
|
2106 {
|
|
|
2107 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2108
|
|
|
2109 /* Convert all our data into convert_to, and then attempt to write
|
|
|
2110 it all out to the other end. */
|
|
|
2111 Dynarr_reset (str->convert_to);
|
|
|
2112 size = XCODESYSMETH (str->codesys, convert,
|
|
|
2113 (str, data, str->convert_to, size));
|
|
|
2114 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0),
|
|
|
2115 Dynarr_length (str->convert_to)) < 0)
|
|
|
2116 return -1;
|
|
|
2117 else
|
|
|
2118 /* The return value indicates how much of the incoming data was
|
|
|
2119 processed, not how many bytes were written. */
|
|
|
2120 return size;
|
|
|
2121 }
|
|
|
2122
|
|
|
2123 static int
|
|
|
2124 encode_decode_source_sink_type_is_char (Lisp_Object cs,
|
|
|
2125 enum source_or_sink sex,
|
|
|
2126 enum encode_decode direction)
|
|
|
2127 {
|
|
|
2128 return (direction == CODING_DECODE ?
|
|
|
2129 decoding_source_sink_type_is_char (cs, sex) :
|
|
|
2130 encoding_source_sink_type_is_char (cs, sex));
|
|
|
2131 }
|
|
|
2132
|
|
|
2133 /* Ensure that the convert methods only get full characters sent to them to
|
|
|
2134 convert if the source of that conversion is characters; and that no such
|
|
|
2135 full-character checking happens when the source is bytes. Keep in mind
|
|
|
2136 that (1) the conversion_end_type return values take the perspective of
|
|
|
2137 encoding; (2) the source for decoding is the same as the sink for
|
|
|
2138 encoding; (3) when writing, the data is given to us, and we set our own
|
|
|
2139 stream to be character mode or not; (4) when reading, the data comes
|
|
|
2140 from the other_end stream, and we set that one to be character mode or
|
|
|
2141 not. This is consistent with the comment above the prototype for
|
|
|
2142 Lstream_set_character_mode(), which lays out rules for who is allowed to
|
|
|
2143 modify the character type mode on a stream.
|
|
|
2144
|
|
814
|
2145 If we're a read stream, we're always setting character mode on the
|
|
|
2146 source, but we also set it on ourselves consistent with the flag that
|
|
|
2147 can disable this (see again the comment above
|
|
|
2148 Lstream_set_character_mode()).
|
|
|
2149 */
|
|
771
|
2150
|
|
|
2151 static void
|
|
|
2152 set_coding_character_mode (Lstream *stream)
|
|
|
2153 {
|
|
|
2154 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2155 Lstream *stream_to_set =
|
|
|
2156 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end;
|
|
|
2157 if (encode_decode_source_sink_type_is_char
|
|
|
2158 (str->codesys, CODING_SOURCE, str->direction))
|
|
|
2159 Lstream_set_character_mode (stream_to_set);
|
|
|
2160 else
|
|
|
2161 Lstream_unset_character_mode (stream_to_set);
|
|
814
|
2162 if (str->set_char_mode_on_us_when_reading &&
|
|
|
2163 (stream->flags & LSTREAM_FL_READ))
|
|
|
2164 {
|
|
|
2165 if (encode_decode_source_sink_type_is_char
|
|
|
2166 (str->codesys, CODING_SINK, str->direction))
|
|
|
2167 Lstream_set_character_mode (stream);
|
|
|
2168 else
|
|
|
2169 Lstream_unset_character_mode (stream);
|
|
|
2170 }
|
|
771
|
2171 }
|
|
|
2172
|
|
|
2173 static Lisp_Object
|
|
|
2174 coding_marker (Lisp_Object stream)
|
|
|
2175 {
|
|
|
2176 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream));
|
|
|
2177
|
|
|
2178 mark_object (str->orig_codesys);
|
|
|
2179 mark_object (str->codesys);
|
|
|
2180 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str));
|
|
|
2181 return wrap_lstream (str->other_end);
|
|
|
2182 }
|
|
|
2183
|
|
|
2184 static int
|
|
|
2185 coding_rewinder (Lstream *stream)
|
|
|
2186 {
|
|
|
2187 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2188 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str));
|
|
|
2189
|
|
|
2190 str->ch = 0;
|
|
|
2191 Dynarr_reset (str->convert_to);
|
|
|
2192 Dynarr_reset (str->convert_from);
|
|
|
2193 return Lstream_rewind (str->other_end);
|
|
|
2194 }
|
|
|
2195
|
|
|
2196 static int
|
|
|
2197 coding_seekable_p (Lstream *stream)
|
|
|
2198 {
|
|
|
2199 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2200 return Lstream_seekable_p (str->other_end);
|
|
|
2201 }
|
|
|
2202
|
|
|
2203 static int
|
|
|
2204 coding_flusher (Lstream *stream)
|
|
|
2205 {
|
|
|
2206 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2207 return Lstream_flush (str->other_end);
|
|
|
2208 }
|
|
|
2209
|
|
|
2210 static int
|
|
|
2211 coding_closer (Lstream *stream)
|
|
|
2212 {
|
|
|
2213 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2214 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2215 {
|
|
|
2216 str->eof = 1;
|
|
|
2217 coding_writer (stream, 0, 0);
|
|
|
2218 str->eof = 0;
|
|
|
2219 }
|
|
|
2220 /* It's safe to free the runoff dynarrs now because they are used only
|
|
|
2221 during conversion. We need to keep the type-specific data around,
|
|
|
2222 though, because of canonicalize_after_coding. */
|
|
|
2223 if (str->convert_to)
|
|
|
2224 {
|
|
|
2225 Dynarr_free (str->convert_to);
|
|
|
2226 str->convert_to = 0;
|
|
|
2227 }
|
|
|
2228 if (str->convert_from)
|
|
428
|
2229 {
|
|
771
|
2230 Dynarr_free (str->convert_from);
|
|
|
2231 str->convert_from = 0;
|
|
|
2232 }
|
|
|
2233
|
|
800
|
2234 if (str->no_close_other)
|
|
|
2235 return Lstream_flush (str->other_end);
|
|
|
2236 else
|
|
|
2237 return Lstream_close (str->other_end);
|
|
771
|
2238 }
|
|
|
2239
|
|
|
2240 static void
|
|
|
2241 coding_finalizer (Lstream *stream)
|
|
|
2242 {
|
|
|
2243 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2244
|
|
|
2245 assert (!str->finalized);
|
|
|
2246 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2247 if (str->data)
|
|
|
2248 {
|
|
|
2249 xfree (str->data);
|
|
|
2250 str->data = 0;
|
|
|
2251 }
|
|
|
2252 str->finalized = 1;
|
|
|
2253 }
|
|
|
2254
|
|
|
2255 static Lisp_Object
|
|
|
2256 coding_stream_canonicalize_after_coding (Lstream *stream)
|
|
|
2257 {
|
|
|
2258 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2259
|
|
|
2260 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding,
|
|
|
2261 (str), str->codesys);
|
|
|
2262 }
|
|
|
2263
|
|
|
2264 Lisp_Object
|
|
|
2265 coding_stream_detected_coding_system (Lstream *stream)
|
|
|
2266 {
|
|
|
2267 Lisp_Object codesys =
|
|
|
2268 coding_stream_canonicalize_after_coding (stream);
|
|
|
2269 if (NILP (codesys))
|
|
|
2270 return Fget_coding_system (Qidentity);
|
|
|
2271 return codesys;
|
|
|
2272 }
|
|
|
2273
|
|
|
2274 Lisp_Object
|
|
|
2275 coding_stream_coding_system (Lstream *stream)
|
|
|
2276 {
|
|
|
2277 return CODING_STREAM_DATA (stream)->codesys;
|
|
|
2278 }
|
|
|
2279
|
|
|
2280 /* Change the coding system associated with a stream. */
|
|
|
2281
|
|
|
2282 void
|
|
|
2283 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2284 {
|
|
|
2285 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2286 if (EQ (str->orig_codesys, codesys))
|
|
|
2287 return;
|
|
|
2288 /* We do the equivalent of closing the stream, destroying it, and
|
|
|
2289 reinitializing it. This includes flushing out the data and signalling
|
|
|
2290 EOF, if we're a writing stream; we also replace the type-specific data
|
|
|
2291 with the data appropriate for the new coding system. */
|
|
|
2292 if (!NILP (str->codesys))
|
|
|
2293 {
|
|
|
2294 if (lstr->flags & LSTREAM_FL_WRITE)
|
|
|
2295 {
|
|
|
2296 Lstream_flush (lstr);
|
|
|
2297 str->eof = 1;
|
|
|
2298 coding_writer (lstr, 0, 0);
|
|
|
2299 str->eof = 0;
|
|
|
2300 }
|
|
|
2301 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2302 }
|
|
|
2303 str->orig_codesys = codesys;
|
|
|
2304 str->codesys = coding_system_real_canonical (codesys);
|
|
|
2305
|
|
|
2306 if (str->data)
|
|
|
2307 {
|
|
|
2308 xfree (str->data);
|
|
|
2309 str->data = 0;
|
|
428
|
2310 }
|
|
771
|
2311 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size)
|
|
|
2312 str->data =
|
|
|
2313 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)->
|
|
|
2314 coding_data_size);
|
|
|
2315 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str));
|
|
|
2316 /* The new coding system may have different ideas regarding whether its
|
|
|
2317 ends are characters or bytes. */
|
|
|
2318 set_coding_character_mode (lstr);
|
|
|
2319 }
|
|
|
2320
|
|
|
2321 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding
|
|
|
2322 stream for writing, no automatic code detection will be performed.
|
|
|
2323 The reason for this is that automatic code detection requires a
|
|
|
2324 seekable input. Things will also fail if you open a coding
|
|
|
2325 stream for reading using a non-fully-specified coding system and
|
|
|
2326 a non-seekable input stream. */
|
|
|
2327
|
|
|
2328 static Lisp_Object
|
|
|
2329 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
800
|
2330 const char *mode, enum encode_decode direction,
|
|
802
|
2331 int flags)
|
|
771
|
2332 {
|
|
|
2333 Lstream *lstr = Lstream_new (lstream_coding, mode);
|
|
|
2334 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2335
|
|
|
2336 codesys = Fget_coding_system (codesys);
|
|
|
2337 xzero (*str);
|
|
|
2338 str->codesys = Qnil;
|
|
|
2339 str->orig_codesys = Qnil;
|
|
|
2340 str->us = lstr;
|
|
|
2341 str->other_end = stream;
|
|
|
2342 str->convert_to = Dynarr_new (unsigned_char);
|
|
|
2343 str->convert_from = Dynarr_new (unsigned_char);
|
|
|
2344 str->direction = direction;
|
|
814
|
2345 if (flags & LSTREAM_FL_NO_CLOSE_OTHER)
|
|
802
|
2346 str->no_close_other = 1;
|
|
814
|
2347 if (flags & LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME)
|
|
802
|
2348 str->one_byte_at_a_time = 1;
|
|
814
|
2349 if (!(flags & LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING))
|
|
|
2350 str->set_char_mode_on_us_when_reading = 1;
|
|
802
|
2351
|
|
771
|
2352 set_coding_stream_coding_system (lstr, codesys);
|
|
793
|
2353 return wrap_lstream (lstr);
|
|
771
|
2354 }
|
|
|
2355
|
|
814
|
2356 /* FLAGS:
|
|
|
2357
|
|
|
2358 LSTREAM_FL_NO_CLOSE_OTHER
|
|
|
2359 Don't close STREAM (the stream at the other end) when this stream is
|
|
|
2360 closed.
|
|
|
2361
|
|
|
2362 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME
|
|
|
2363 When reading from STREAM, read and process one byte at a time rather
|
|
|
2364 than in large chunks. This is for reading from TTY's, so we don't
|
|
|
2365 block. #### We should instead create a non-blocking filedesc stream
|
|
|
2366 that emulates the behavior as necessary using select(), when the
|
|
|
2367 fcntls don't work. (As seems to be the case on Cygwin.)
|
|
|
2368
|
|
|
2369 LSTREAM_FL_NO_INIT_CHAR_MODE_WHEN_READING
|
|
|
2370 When reading from STREAM, read and process one byte at a time rather
|
|
|
2371 than in large chunks. This is for reading from TTY's, so we don't
|
|
|
2372 block. #### We should instead create a non-blocking filedesc stream
|
|
|
2373 that emulates the behavior as necessary using select(), when the
|
|
|
2374 fcntls don't work. (As seems to be the case on Cygwin.)
|
|
|
2375 */
|
|
771
|
2376 Lisp_Object
|
|
|
2377 make_coding_input_stream (Lstream *stream, Lisp_Object codesys,
|
|
802
|
2378 enum encode_decode direction, int flags)
|
|
771
|
2379 {
|
|
800
|
2380 return make_coding_stream_1 (stream, codesys, "r", direction,
|
|
802
|
2381 flags);
|
|
771
|
2382 }
|
|
|
2383
|
|
814
|
2384 /* FLAGS:
|
|
|
2385
|
|
|
2386 LSTREAM_FL_NO_CLOSE_OTHER
|
|
|
2387 Don't close STREAM (the stream at the other end) when this stream is
|
|
|
2388 closed.
|
|
|
2389 */
|
|
771
|
2390 Lisp_Object
|
|
|
2391 make_coding_output_stream (Lstream *stream, Lisp_Object codesys,
|
|
802
|
2392 enum encode_decode direction, int flags)
|
|
771
|
2393 {
|
|
800
|
2394 return make_coding_stream_1 (stream, codesys, "w", direction,
|
|
802
|
2395 flags);
|
|
771
|
2396 }
|
|
|
2397
|
|
|
2398 static Lisp_Object
|
|
|
2399 encode_decode_coding_region (Lisp_Object start, Lisp_Object end,
|
|
|
2400 Lisp_Object coding_system, Lisp_Object buffer,
|
|
|
2401 enum encode_decode direction)
|
|
|
2402 {
|
|
|
2403 Charbpos b, e;
|
|
|
2404 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2405 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil;
|
|
|
2406 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil;
|
|
|
2407 Lisp_Object lb_outstream = Qnil;
|
|
|
2408 Lisp_Object next;
|
|
|
2409 Lstream *istr, *ostr;
|
|
|
2410 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
2411 struct gcpro ngcpro1;
|
|
|
2412 int source_char, sink_char;
|
|
|
2413
|
|
|
2414 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2415 barf_if_buffer_read_only (buf, b, e);
|
|
|
2416
|
|
|
2417 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream);
|
|
|
2418 NGCPRO1 (auto_outstream);
|
|
|
2419
|
|
|
2420 coding_system = Fget_coding_system (coding_system);
|
|
|
2421 source_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2422 CODING_SOURCE,
|
|
|
2423 direction);
|
|
|
2424 sink_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2425 CODING_SINK,
|
|
|
2426 direction);
|
|
|
2427
|
|
|
2428 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */
|
|
|
2429 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2430 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2431
|
|
|
2432 if (direction == CODING_DECODE &&
|
|
|
2433 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
2434 next = auto_outstream =
|
|
|
2435 make_coding_output_stream
|
|
800
|
2436 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect),
|
|
|
2437 CODING_DECODE, 0);
|
|
771
|
2438
|
|
|
2439 if (!sink_char)
|
|
|
2440 next = from_outstream =
|
|
800
|
2441 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0);
|
|
771
|
2442 outstream = make_coding_output_stream (XLSTREAM (next), coding_system,
|
|
800
|
2443 direction, 0);
|
|
771
|
2444 if (!source_char)
|
|
428
|
2445 {
|
|
771
|
2446 to_outstream =
|
|
|
2447 make_coding_output_stream (XLSTREAM (outstream),
|
|
800
|
2448 Qbinary, CODING_ENCODE, 0);
|
|
771
|
2449 ostr = XLSTREAM (to_outstream);
|
|
|
2450 }
|
|
|
2451 else
|
|
|
2452 ostr = XLSTREAM (outstream);
|
|
|
2453 istr = XLSTREAM (instream);
|
|
|
2454
|
|
|
2455 /* The chain of streams looks like this:
|
|
|
2456
|
|
|
2457 [BUFFER] <----- send through
|
|
|
2458 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is
|
|
|
2459 in bytes]
|
|
|
2460 ------> [ENCODE/DECODE AS SPECIFIED]
|
|
|
2461 ------> [BYTE->CHAR i.e. DECODE AS BINARY
|
|
|
2462 if sink is in bytes]
|
|
|
2463 ------> [AUTODETECT EOL if
|
|
|
2464 we're decoding and
|
|
|
2465 coding system calls
|
|
|
2466 for this]
|
|
|
2467 ------> [BUFFER]
|
|
|
2468 */
|
|
|
2469 while (1)
|
|
|
2470 {
|
|
|
2471 char tempbuf[1024]; /* some random amount */
|
|
|
2472 Charbpos newpos, even_newer_pos;
|
|
|
2473 Charbpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2474 Bytecount size_in_bytes =
|
|
|
2475 Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2476
|
|
|
2477 if (!size_in_bytes)
|
|
|
2478 break;
|
|
|
2479 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2480 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2481 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2482 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2483 even_newer_pos, 0);
|
|
428
|
2484 }
|
|
771
|
2485
|
|
|
2486 {
|
|
|
2487 Charcount retlen =
|
|
|
2488 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2489 Lstream_close (istr);
|
|
|
2490 Lstream_close (ostr);
|
|
|
2491 NUNGCPRO;
|
|
|
2492 UNGCPRO;
|
|
|
2493 Lstream_delete (istr);
|
|
|
2494 if (!NILP (from_outstream))
|
|
|
2495 Lstream_delete (XLSTREAM (from_outstream));
|
|
|
2496 Lstream_delete (XLSTREAM (outstream));
|
|
|
2497 if (!NILP (to_outstream))
|
|
|
2498 Lstream_delete (XLSTREAM (to_outstream));
|
|
|
2499 if (!NILP (auto_outstream))
|
|
|
2500 Lstream_delete (XLSTREAM (auto_outstream));
|
|
|
2501 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2502 return make_int (retlen);
|
|
|
2503 }
|
|
|
2504 }
|
|
|
2505
|
|
|
2506 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2507 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2508 This is useful if you've read in encoded text from a file without decoding
|
|
|
2509 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2510 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2511 Return length of decoded text.
|
|
|
2512 BUFFER defaults to the current buffer if unspecified.
|
|
|
2513 */
|
|
|
2514 (start, end, coding_system, buffer))
|
|
|
2515 {
|
|
|
2516 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2517 CODING_DECODE);
|
|
|
2518 }
|
|
|
2519
|
|
|
2520 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2521 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2522 This will, for example, convert Japanese characters into stuff such as
|
|
|
2523 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2524 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2525 */
|
|
|
2526 (start, end, coding_system, buffer))
|
|
|
2527 {
|
|
|
2528 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2529 CODING_ENCODE);
|
|
428
|
2530 }
|
|
|
2531
|
|
|
2532
|
|
|
2533 /************************************************************************/
|
|
771
|
2534 /* Chain methods */
|
|
428
|
2535 /************************************************************************/
|
|
|
2536
|
|
771
|
2537 /* #### Need a way to create "opposite-direction" coding systems. */
|
|
|
2538
|
|
|
2539 /* Chain two or more coding systems together to make a combination coding
|
|
|
2540 system. */
|
|
|
2541 DEFINE_CODING_SYSTEM_TYPE (chain);
|
|
|
2542
|
|
|
2543 struct chain_coding_system
|
|
|
2544 {
|
|
|
2545 /* List of coding systems, in decode order */
|
|
|
2546 Lisp_Object *chain;
|
|
|
2547 /* Number of coding systems in list */
|
|
|
2548 int count;
|
|
|
2549 /* Coding system to return as a result of canonicalize-after-coding */
|
|
|
2550 Lisp_Object canonicalize_after_coding;
|
|
|
2551 };
|
|
|
2552
|
|
|
2553 struct chain_coding_stream
|
|
|
2554 {
|
|
|
2555 int initted;
|
|
|
2556 /* Lstreams for chain coding system */
|
|
|
2557 Lisp_Object *lstreams;
|
|
|
2558 int lstream_count;
|
|
|
2559 };
|
|
|
2560
|
|
|
2561 static const struct lrecord_description lo_description_1[] = {
|
|
|
2562 { XD_LISP_OBJECT, 0 },
|
|
|
2563 { XD_END }
|
|
|
2564 };
|
|
|
2565
|
|
|
2566 static const struct struct_description lo_description = {
|
|
|
2567 sizeof (Lisp_Object),
|
|
|
2568 lo_description_1
|
|
|
2569 };
|
|
|
2570
|
|
|
2571 static const struct lrecord_description chain_coding_system_description[] = {
|
|
|
2572 { XD_INT,
|
|
|
2573 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2574 count) },
|
|
|
2575 { XD_STRUCT_PTR,
|
|
|
2576 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2577 chain),
|
|
|
2578 XD_INDIRECT (0, 0), &lo_description },
|
|
|
2579 { XD_LISP_OBJECT,
|
|
|
2580 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2581 canonicalize_after_coding) },
|
|
|
2582 { XD_END }
|
|
|
2583 };
|
|
|
2584
|
|
|
2585 static Lisp_Object
|
|
|
2586 chain_canonicalize (Lisp_Object codesys)
|
|
|
2587 {
|
|
|
2588 /* We make use of the fact that this method is called at init time, after
|
|
|
2589 properties have been parsed. init_method is called too early. */
|
|
|
2590 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2591 any more. */
|
|
|
2592 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys),
|
|
|
2593 XCODING_SYSTEM_CHAIN_CHAIN (codesys));
|
|
|
2594 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys),
|
|
|
2595 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys),
|
|
|
2596 chain));
|
|
|
2597 Fputhash (chain, codesys, Vchain_canonicalize_hash_table);
|
|
|
2598 return codesys;
|
|
|
2599 }
|
|
|
2600
|
|
|
2601 static Lisp_Object
|
|
|
2602 chain_canonicalize_after_coding (struct coding_stream *str)
|
|
|
2603 {
|
|
|
2604 Lisp_Object cac =
|
|
|
2605 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys);
|
|
|
2606 if (!NILP (cac))
|
|
|
2607 return cac;
|
|
|
2608 return str->codesys;
|
|
|
2609 #if 0
|
|
|
2610 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2611 Lisp_Object us = str->codesys, codesys;
|
|
|
2612 int i;
|
|
|
2613 Lisp_Object chain;
|
|
|
2614 Lisp_Object tail;
|
|
|
2615 int changed = 0;
|
|
|
2616
|
|
|
2617 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2618 any more. */
|
|
|
2619 if (str->direction == CODING_ENCODE || !data->initted)
|
|
|
2620 return us;
|
|
|
2621
|
|
|
2622 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us),
|
|
|
2623 XCODING_SYSTEM_CHAIN_CHAIN (us));
|
|
|
2624
|
|
|
2625 tail = chain;
|
|
|
2626 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++)
|
|
|
2627 {
|
|
|
2628 codesys = (coding_stream_canonicalize_after_coding
|
|
|
2629 (XLSTREAM (data->lstreams[i])));
|
|
|
2630 if (!EQ (codesys, XCAR (tail)))
|
|
|
2631 changed = 1;
|
|
|
2632 XCAR (tail) = codesys;
|
|
|
2633 tail = XCDR (tail);
|
|
|
2634 }
|
|
|
2635
|
|
|
2636 if (!changed)
|
|
|
2637 return us;
|
|
|
2638
|
|
|
2639 chain = delq_no_quit (Qnil, chain);
|
|
|
2640
|
|
|
2641 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) &&
|
|
|
2642 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us)))
|
|
|
2643 {
|
|
|
2644 if (NILP (chain))
|
|
|
2645 return Qnil;
|
|
|
2646 if (NILP (XCDR (chain)))
|
|
|
2647 return XCAR (chain);
|
|
|
2648 }
|
|
|
2649
|
|
|
2650 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us),
|
|
|
2651 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us),
|
|
|
2652 chain)), Vchain_canonicalize_hash_table,
|
|
|
2653 Qnil);
|
|
|
2654 if (!NILP (codesys))
|
|
|
2655 return codesys;
|
|
|
2656 return make_internal_coding_system
|
|
|
2657 (us, "internal-chain-canonicalizer-wrapper",
|
|
|
2658 Qchain, Qunbound, list2 (Qchain, chain));
|
|
|
2659 #endif /* 0 */
|
|
|
2660 }
|
|
|
2661
|
|
|
2662 static void
|
|
|
2663 chain_init (Lisp_Object codesys)
|
|
|
2664 {
|
|
|
2665 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil;
|
|
|
2666 }
|
|
|
2667
|
|
|
2668 static void
|
|
|
2669 chain_mark (Lisp_Object codesys)
|
|
|
2670 {
|
|
|
2671 int i;
|
|
|
2672
|
|
|
2673 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++)
|
|
|
2674 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]);
|
|
|
2675 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys));
|
|
|
2676 }
|
|
|
2677
|
|
|
2678 static void
|
|
|
2679 chain_mark_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2680 {
|
|
|
2681 int i;
|
|
|
2682
|
|
|
2683 for (i = 0; i < data->lstream_count; i++)
|
|
|
2684 mark_object (data->lstreams[i]);
|
|
|
2685 }
|
|
|
2686
|
|
|
2687 static void
|
|
|
2688 chain_mark_coding_stream (struct coding_stream *str)
|
|
|
2689 {
|
|
|
2690 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2691 }
|
|
|
2692
|
|
|
2693 static void
|
|
|
2694 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
2695 {
|
|
|
2696 int i;
|
|
|
2697
|
|
826
|
2698 write_c_string (printcharfun, "(");
|
|
771
|
2699 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++)
|
|
|
2700 {
|
|
826
|
2701 write_c_string (printcharfun, i == 0 ? "" : "->");
|
|
771
|
2702 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i],
|
|
|
2703 printcharfun, escapeflag);
|
|
|
2704 }
|
|
|
2705 {
|
|
|
2706 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs);
|
|
|
2707 if (!NILP (cac))
|
|
|
2708 {
|
|
|
2709 if (i > 0)
|
|
826
|
2710 write_c_string (printcharfun, " ");
|
|
|
2711 write_c_string (printcharfun, "canonicalize-after-coding=");
|
|
771
|
2712 print_coding_system_in_print_method (cac, printcharfun, escapeflag);
|
|
|
2713 }
|
|
|
2714 }
|
|
|
2715
|
|
826
|
2716 write_c_string (printcharfun, ")");
|
|
771
|
2717 }
|
|
|
2718
|
|
|
2719 static void
|
|
|
2720 chain_rewind_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2721 {
|
|
|
2722 /* Each will rewind the next; there is always at least one stream (the
|
|
|
2723 dynarr stream at the end) if we're initted */
|
|
|
2724 if (data->initted)
|
|
|
2725 Lstream_rewind (XLSTREAM (data->lstreams[0]));
|
|
|
2726 }
|
|
|
2727
|
|
|
2728 static void
|
|
|
2729 chain_rewind_coding_stream (struct coding_stream *str)
|
|
|
2730 {
|
|
|
2731 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2732 }
|
|
|
2733
|
|
|
2734 static void
|
|
|
2735 chain_init_coding_streams_1 (struct chain_coding_stream *data,
|
|
|
2736 unsigned_char_dynarr *dst,
|
|
|
2737 int ncodesys, Lisp_Object *codesys,
|
|
|
2738 enum encode_decode direction)
|
|
|
2739 {
|
|
|
2740 int i;
|
|
|
2741 Lisp_Object lstream_out;
|
|
|
2742
|
|
|
2743 data->lstream_count = ncodesys + 1;
|
|
|
2744 data->lstreams = xnew_array (Lisp_Object, data->lstream_count);
|
|
|
2745
|
|
|
2746 lstream_out = make_dynarr_output_stream (dst);
|
|
|
2747 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0);
|
|
|
2748 data->lstreams[data->lstream_count - 1] = lstream_out;
|
|
|
2749
|
|
|
2750 for (i = ncodesys - 1; i >= 0; i--)
|
|
|
2751 {
|
|
|
2752 data->lstreams[i] =
|
|
|
2753 make_coding_output_stream
|
|
|
2754 (XLSTREAM (lstream_out),
|
|
|
2755 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i],
|
|
800
|
2756 direction, 0);
|
|
771
|
2757 lstream_out = data->lstreams[i];
|
|
|
2758 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED,
|
|
|
2759 0);
|
|
|
2760 }
|
|
|
2761 data->initted = 1;
|
|
|
2762 }
|
|
|
2763
|
|
|
2764 static Bytecount
|
|
|
2765 chain_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
2766 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2767 {
|
|
|
2768 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2769
|
|
|
2770 if (str->eof)
|
|
|
2771 {
|
|
|
2772 /* Each will close the next; there is always at least one stream (the
|
|
|
2773 dynarr stream at the end) if we're initted. We need to close now
|
|
|
2774 because more data may be generated. */
|
|
|
2775 if (data->initted)
|
|
|
2776 Lstream_close (XLSTREAM (data->lstreams[0]));
|
|
|
2777 return n;
|
|
|
2778 }
|
|
|
2779
|
|
|
2780 if (!data->initted)
|
|
|
2781 chain_init_coding_streams_1
|
|
|
2782 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys),
|
|
|
2783 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction);
|
|
|
2784
|
|
|
2785 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0)
|
|
|
2786 return -1;
|
|
|
2787 return n;
|
|
|
2788 }
|
|
|
2789
|
|
|
2790 static void
|
|
|
2791 chain_finalize_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2792 {
|
|
|
2793 if (data->lstreams)
|
|
|
2794 {
|
|
|
2795 /* Order of deletion is important here! Delete from the head of the
|
|
|
2796 chain and work your way towards the tail. In general, when you
|
|
|
2797 delete an object, there should be *NO* pointers to it anywhere.
|
|
|
2798 Deleting back-to-front would be a problem because there are
|
|
|
2799 pointers going forward. If there were pointers in both
|
|
|
2800 directions, you'd have to disconnect the pointers to a particular
|
|
|
2801 object before deleting it. */
|
|
|
2802 if (!gc_in_progress)
|
|
|
2803 {
|
|
|
2804 int i;
|
|
|
2805 /* During GC, these objects are unmarked, and are about to be
|
|
|
2806 freed. We do NOT want them on the free list, and that will
|
|
|
2807 cause lots of nastiness including crashes. Just let them be
|
|
|
2808 freed normally. */
|
|
|
2809 for (i = 0; i < data->lstream_count; i++)
|
|
|
2810 Lstream_delete (XLSTREAM ((data->lstreams)[i]));
|
|
|
2811 }
|
|
|
2812 xfree (data->lstreams);
|
|
|
2813 }
|
|
|
2814 }
|
|
|
2815
|
|
|
2816 static void
|
|
|
2817 chain_finalize_coding_stream (struct coding_stream *str)
|
|
|
2818 {
|
|
|
2819 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2820 }
|
|
|
2821
|
|
|
2822 static void
|
|
|
2823 chain_finalize (Lisp_Object c)
|
|
|
2824 {
|
|
|
2825 if (XCODING_SYSTEM_CHAIN_CHAIN (c))
|
|
|
2826 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c));
|
|
|
2827 }
|
|
|
2828
|
|
428
|
2829 static int
|
|
771
|
2830 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
2831 {
|
|
|
2832 if (EQ (key, Qchain))
|
|
|
2833 {
|
|
|
2834 Lisp_Object tail;
|
|
|
2835 Lisp_Object *cslist;
|
|
|
2836 int count = 0;
|
|
|
2837 int i;
|
|
|
2838
|
|
|
2839 EXTERNAL_LIST_LOOP (tail, value)
|
|
|
2840 {
|
|
|
2841 Fget_coding_system (XCAR (tail));
|
|
|
2842 count++;
|
|
|
2843 }
|
|
|
2844
|
|
|
2845 cslist = xnew_array (Lisp_Object, count);
|
|
|
2846 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist;
|
|
|
2847
|
|
|
2848 count = 0;
|
|
|
2849 EXTERNAL_LIST_LOOP (tail, value)
|
|
|
2850 {
|
|
|
2851 cslist[count] = Fget_coding_system (XCAR (tail));
|
|
|
2852 count++;
|
|
|
2853 }
|
|
|
2854
|
|
|
2855 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count;
|
|
|
2856
|
|
|
2857 for (i = 0; i < count - 1; i++)
|
|
|
2858 {
|
|
|
2859 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) !=
|
|
|
2860 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE))
|
|
|
2861 invalid_argument_2 ("Sink of first must match source of second",
|
|
|
2862 cslist[i], cslist[i + 1]);
|
|
|
2863 }
|
|
|
2864 }
|
|
|
2865 else if (EQ (key, Qcanonicalize_after_coding))
|
|
|
2866 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) =
|
|
|
2867 Fget_coding_system (value);
|
|
|
2868 else
|
|
|
2869 return 0;
|
|
|
2870 return 1;
|
|
|
2871 }
|
|
|
2872
|
|
|
2873 static Lisp_Object
|
|
|
2874 chain_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
2875 {
|
|
|
2876 if (EQ (prop, Qchain))
|
|
|
2877 {
|
|
|
2878 Lisp_Object result = Qnil;
|
|
|
2879 int i;
|
|
|
2880
|
|
|
2881 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++)
|
|
|
2882 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i],
|
|
|
2883 result);
|
|
|
2884
|
|
|
2885 return Fnreverse (result);
|
|
|
2886 }
|
|
|
2887 else if (EQ (prop, Qcanonicalize_after_coding))
|
|
|
2888 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system);
|
|
|
2889 else
|
|
|
2890 return Qunbound;
|
|
|
2891 }
|
|
|
2892
|
|
|
2893 static enum source_sink_type
|
|
|
2894 chain_conversion_end_type (Lisp_Object codesys)
|
|
|
2895 {
|
|
|
2896 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys);
|
|
|
2897 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys);
|
|
|
2898 int charp_source, charp_sink;
|
|
|
2899
|
|
|
2900 if (n == 0)
|
|
|
2901 return DECODES_BYTE_TO_BYTE; /* arbitrary */
|
|
|
2902 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE);
|
|
|
2903 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK);
|
|
|
2904
|
|
|
2905 switch (charp_source * 2 + charp_sink)
|
|
|
2906 {
|
|
|
2907 case 0: return DECODES_BYTE_TO_BYTE;
|
|
|
2908 case 1: return DECODES_BYTE_TO_CHARACTER;
|
|
|
2909 case 2: return DECODES_CHARACTER_TO_BYTE;
|
|
|
2910 case 3: return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
2911 }
|
|
|
2912
|
|
|
2913 abort ();
|
|
|
2914 return DECODES_BYTE_TO_BYTE;
|
|
|
2915 }
|
|
|
2916
|
|
|
2917
|
|
|
2918 /************************************************************************/
|
|
|
2919 /* No-conversion methods */
|
|
|
2920 /************************************************************************/
|
|
|
2921
|
|
|
2922 /* "No conversion"; used for binary files. We use quotes because there
|
|
|
2923 really is some conversion being applied (it does byte<->char
|
|
|
2924 conversion), but it appears to the user as if the text is read in
|
|
|
2925 without conversion. */
|
|
|
2926 DEFINE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
2927
|
|
|
2928 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
2929 contain all 256 possible byte values and that are not to be
|
|
|
2930 interpreted as being in any particular encoding. */
|
|
|
2931 static Bytecount
|
|
|
2932 no_conversion_convert (struct coding_stream *str,
|
|
|
2933 const UExtbyte *src,
|
|
|
2934 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2935 {
|
|
|
2936 UExtbyte c;
|
|
|
2937 unsigned int ch = str->ch;
|
|
|
2938 Bytecount orign = n;
|
|
|
2939
|
|
|
2940 if (str->direction == CODING_DECODE)
|
|
|
2941 {
|
|
|
2942 while (n--)
|
|
|
2943 {
|
|
|
2944 c = *src++;
|
|
|
2945
|
|
|
2946 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2947 }
|
|
|
2948
|
|
|
2949 if (str->eof)
|
|
|
2950 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst);
|
|
|
2951 }
|
|
|
2952 else
|
|
|
2953 {
|
|
|
2954
|
|
|
2955 while (n--)
|
|
|
2956 {
|
|
|
2957 c = *src++;
|
|
826
|
2958 if (byte_ascii_p (c))
|
|
771
|
2959 {
|
|
|
2960 assert (ch == 0);
|
|
|
2961 Dynarr_add (dst, c);
|
|
|
2962 }
|
|
|
2963 #ifdef MULE
|
|
867
|
2964 else if (ibyte_leading_byte_p (c))
|
|
771
|
2965 {
|
|
|
2966 assert (ch == 0);
|
|
|
2967 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
2968 c == LEADING_BYTE_CONTROL_1)
|
|
|
2969 ch = c;
|
|
|
2970 else
|
|
|
2971 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
2972 }
|
|
|
2973 else
|
|
|
2974 {
|
|
|
2975 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
2976 Dynarr_add (dst, c);
|
|
|
2977 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
2978 {
|
|
|
2979 assert (c < 0xC0);
|
|
|
2980 Dynarr_add (dst, c - 0x20);
|
|
|
2981 }
|
|
|
2982 /* else it should be the second or third byte of an
|
|
|
2983 untranslatable character, so ignore it */
|
|
|
2984 ch = 0;
|
|
|
2985 }
|
|
|
2986 #endif /* MULE */
|
|
|
2987
|
|
|
2988 }
|
|
|
2989 }
|
|
|
2990
|
|
|
2991 str->ch = ch;
|
|
|
2992 return orign;
|
|
|
2993 }
|
|
|
2994
|
|
|
2995 DEFINE_DETECTOR (no_conversion);
|
|
|
2996 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
2997
|
|
|
2998 struct no_conversion_detector
|
|
|
2999 {
|
|
|
3000 int dummy;
|
|
|
3001 };
|
|
|
3002
|
|
|
3003 static void
|
|
|
3004 no_conversion_detect (struct detection_state *st, const UExtbyte *src,
|
|
|
3005 Bytecount n)
|
|
|
3006 {
|
|
|
3007 /* Hack until we get better handling of this stuff! */
|
|
|
3008 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY;
|
|
|
3009 }
|
|
|
3010
|
|
|
3011
|
|
|
3012 /************************************************************************/
|
|
|
3013 /* Convert-eol methods */
|
|
|
3014 /************************************************************************/
|
|
|
3015
|
|
|
3016 /* This is used to handle end-of-line (EOL) differences. It is
|
|
|
3017 character-to-character, and works (when encoding) *BEFORE* sending
|
|
|
3018 data to the main encoding routine -- thus, that routine must handle
|
|
|
3019 different EOL types itself if it does line-oriented type processing.
|
|
|
3020 This is unavoidable because we don't know whether the output of the
|
|
|
3021 main encoding routine is ASCII compatible (Unicode is definitely not,
|
|
|
3022 for example).
|
|
|
3023
|
|
793
|
3024 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil.
|
|
771
|
3025 */
|
|
|
3026
|
|
|
3027 DEFINE_CODING_SYSTEM_TYPE (convert_eol);
|
|
|
3028
|
|
|
3029 struct convert_eol_coding_system
|
|
|
3030 {
|
|
|
3031 enum eol_type subtype;
|
|
|
3032 };
|
|
|
3033
|
|
|
3034 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
3035 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
3036 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
3037 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
3038
|
|
|
3039 struct convert_eol_coding_stream
|
|
|
3040 {
|
|
|
3041 enum eol_type actual;
|
|
|
3042 };
|
|
|
3043
|
|
|
3044 static const struct lrecord_description
|
|
|
3045 convert_eol_coding_system_description[] = {
|
|
|
3046 { XD_END }
|
|
|
3047 };
|
|
|
3048
|
|
|
3049 static void
|
|
|
3050 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
3051 {
|
|
|
3052 struct convert_eol_coding_system *data =
|
|
|
3053 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol);
|
|
|
3054
|
|
|
3055 write_fmt_string (printcharfun, "(%s)",
|
|
|
3056 data->subtype == EOL_LF ? "lf" :
|
|
|
3057 data->subtype == EOL_CRLF ? "crlf" :
|
|
|
3058 data->subtype == EOL_CR ? "cr" :
|
|
793
|
3059 data->subtype == EOL_AUTODETECT ? "nil" :
|
|
771
|
3060 (abort(), ""));
|
|
|
3061 }
|
|
|
3062
|
|
|
3063 static enum source_sink_type
|
|
|
3064 convert_eol_conversion_end_type (Lisp_Object codesys)
|
|
|
3065 {
|
|
|
3066 return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
3067 }
|
|
|
3068
|
|
|
3069 static int
|
|
|
3070 convert_eol_putprop (Lisp_Object codesys,
|
|
|
3071 Lisp_Object key,
|
|
|
3072 Lisp_Object value)
|
|
|
3073 {
|
|
|
3074 struct convert_eol_coding_system *data =
|
|
|
3075 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol);
|
|
|
3076
|
|
|
3077 if (EQ (key, Qsubtype))
|
|
|
3078 {
|
|
|
3079 if (EQ (value, Qlf) /* || EQ (value, Qunix) */)
|
|
|
3080 data->subtype = EOL_LF;
|
|
|
3081 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */)
|
|
|
3082 data->subtype = EOL_CRLF;
|
|
|
3083 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */)
|
|
|
3084 data->subtype = EOL_CR;
|
|
793
|
3085 else if (EQ (value, Qnil))
|
|
771
|
3086 data->subtype = EOL_AUTODETECT;
|
|
|
3087 else invalid_constant ("Unrecognized eol type", value);
|
|
|
3088 }
|
|
|
3089 else
|
|
|
3090 return 0;
|
|
|
3091 return 1;
|
|
|
3092 }
|
|
|
3093
|
|
|
3094 static Lisp_Object
|
|
|
3095 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
3096 {
|
|
|
3097 struct convert_eol_coding_system *data =
|
|
|
3098 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol);
|
|
|
3099
|
|
|
3100 if (EQ (prop, Qsubtype))
|
|
|
3101 {
|
|
|
3102 switch (data->subtype)
|
|
|
3103 {
|
|
|
3104 case EOL_LF: return Qlf;
|
|
|
3105 case EOL_CRLF: return Qcrlf;
|
|
|
3106 case EOL_CR: return Qcr;
|
|
793
|
3107 case EOL_AUTODETECT: return Qnil;
|
|
771
|
3108 default: abort ();
|
|
|
3109 }
|
|
|
3110 }
|
|
|
3111
|
|
|
3112 return Qunbound;
|
|
|
3113 }
|
|
|
3114
|
|
|
3115 static void
|
|
|
3116 convert_eol_init_coding_stream (struct coding_stream *str)
|
|
|
3117 {
|
|
|
3118 struct convert_eol_coding_stream *data =
|
|
|
3119 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3120 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
|
3121 }
|
|
|
3122
|
|
|
3123 static Bytecount
|
|
867
|
3124 convert_eol_convert (struct coding_stream *str, const Ibyte *src,
|
|
771
|
3125 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
3126 {
|
|
|
3127 if (str->direction == CODING_DECODE)
|
|
|
3128 {
|
|
|
3129 struct convert_eol_coding_stream *data =
|
|
|
3130 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3131
|
|
|
3132 if (data->actual == EOL_AUTODETECT)
|
|
|
3133 {
|
|
|
3134 Bytecount n2 = n;
|
|
867
|
3135 const Ibyte *src2 = src;
|
|
771
|
3136
|
|
|
3137 for (; n2; n2--)
|
|
|
3138 {
|
|
867
|
3139 Ibyte c = *src2++;
|
|
771
|
3140 if (c == '\n')
|
|
|
3141 {
|
|
|
3142 data->actual = EOL_LF;
|
|
|
3143 break;
|
|
|
3144 }
|
|
|
3145 else if (c == '\r')
|
|
|
3146 {
|
|
|
3147 if (n2 == 1)
|
|
|
3148 {
|
|
|
3149 /* If we're seeing a '\r' at the end of the data, then
|
|
|
3150 reject the '\r' right now so it doesn't become an
|
|
|
3151 issue in the code below -- unless we're at the end of
|
|
|
3152 the stream, in which case we can't do that (because
|
|
|
3153 then the '\r' will never get written out), and in any
|
|
|
3154 case we should be recognizing it at EOL_CR format. */
|
|
|
3155 if (str->eof)
|
|
|
3156 data->actual = EOL_CR;
|
|
|
3157 else
|
|
|
3158 n--;
|
|
|
3159 break;
|
|
|
3160 }
|
|
|
3161 else if (*src2 == '\n')
|
|
|
3162 data->actual = EOL_CRLF;
|
|
|
3163 else
|
|
|
3164 data->actual = EOL_CR;
|
|
|
3165 break;
|
|
|
3166 }
|
|
|
3167 }
|
|
|
3168 }
|
|
|
3169
|
|
|
3170 /* str->eof is set, the caller reached EOF on the other end and has
|
|
|
3171 no new data to give us. The only data we get is the data we
|
|
|
3172 rejected from last time. */
|
|
|
3173 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT ||
|
|
|
3174 (str->eof))
|
|
|
3175 Dynarr_add_many (dst, src, n);
|
|
|
3176 else
|
|
|
3177 {
|
|
867
|
3178 const Ibyte *end = src + n;
|
|
771
|
3179 while (1)
|
|
|
3180 {
|
|
|
3181 /* Find the next section with no \r and add it. */
|
|
867
|
3182 const Ibyte *runstart = src;
|
|
|
3183 src = (Ibyte *) memchr (src, '\r', end - src);
|
|
771
|
3184 if (!src)
|
|
|
3185 src = end;
|
|
|
3186 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
3187 /* Stop if at end ... */
|
|
|
3188 if (src == end)
|
|
|
3189 break;
|
|
|
3190 /* ... else, translate as necessary. */
|
|
|
3191 src++;
|
|
|
3192 if (data->actual == EOL_CR)
|
|
|
3193 Dynarr_add (dst, '\n');
|
|
|
3194 /* We need to be careful here with CRLF. If we see a CR at the
|
|
|
3195 end of the data, we don't know if it's part of a CRLF, so we
|
|
|
3196 reject it. Otherwise: If it's part of a CRLF, eat it and
|
|
|
3197 loop; the following LF gets added next time around. If it's
|
|
|
3198 not part of a CRLF, add the CR and loop. The following
|
|
|
3199 character will be processed in the next loop iteration. This
|
|
|
3200 correctly handles a sequence like CR+CR+LF. */
|
|
|
3201 else if (src == end)
|
|
|
3202 return n - 1; /* reject the CR at the end; we'll get it again
|
|
|
3203 next time the convert method is called */
|
|
|
3204 else if (*src != '\n')
|
|
|
3205 Dynarr_add (dst, '\r');
|
|
|
3206 }
|
|
|
3207 }
|
|
|
3208
|
|
|
3209 return n;
|
|
|
3210 }
|
|
|
3211 else
|
|
|
3212 {
|
|
|
3213 enum eol_type subtype =
|
|
|
3214 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
867
|
3215 const Ibyte *end = src + n;
|
|
771
|
3216
|
|
|
3217 /* We try to be relatively efficient here. */
|
|
|
3218 if (subtype == EOL_LF)
|
|
|
3219 Dynarr_add_many (dst, src, n);
|
|
|
3220 else
|
|
|
3221 {
|
|
|
3222 while (1)
|
|
|
3223 {
|
|
|
3224 /* Find the next section with no \n and add it. */
|
|
867
|
3225 const Ibyte *runstart = src;
|
|
|
3226 src = (Ibyte *) memchr (src, '\n', end - src);
|
|
771
|
3227 if (!src)
|
|
|
3228 src = end;
|
|
|
3229 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
3230 /* Stop if at end ... */
|
|
|
3231 if (src == end)
|
|
|
3232 break;
|
|
|
3233 /* ... else, skip over \n and add its translation. */
|
|
|
3234 src++;
|
|
|
3235 Dynarr_add (dst, '\r');
|
|
|
3236 if (subtype == EOL_CRLF)
|
|
|
3237 Dynarr_add (dst, '\n');
|
|
|
3238 }
|
|
|
3239 }
|
|
|
3240
|
|
|
3241 return n;
|
|
|
3242 }
|
|
|
3243 }
|
|
|
3244
|
|
|
3245 static Lisp_Object
|
|
|
3246 convert_eol_canonicalize_after_coding (struct coding_stream *str)
|
|
|
3247 {
|
|
|
3248 struct convert_eol_coding_stream *data =
|
|
|
3249 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3250
|
|
|
3251 if (str->direction == CODING_ENCODE)
|
|
|
3252 return str->codesys;
|
|
|
3253
|
|
|
3254 switch (data->actual)
|
|
|
3255 {
|
|
|
3256 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf);
|
|
|
3257 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf);
|
|
|
3258 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr);
|
|
|
3259 case EOL_AUTODETECT: return str->codesys;
|
|
|
3260 default: abort (); return Qnil;
|
|
|
3261 }
|
|
|
3262 }
|
|
|
3263
|
|
|
3264
|
|
|
3265 /************************************************************************/
|
|
|
3266 /* Undecided methods */
|
|
|
3267 /************************************************************************/
|
|
|
3268
|
|
|
3269 /* Do autodetection. We can autodetect the EOL type only, the coding
|
|
|
3270 system only, or both. We only do autodetection when decoding; when
|
|
|
3271 encoding, we just pass the data through.
|
|
|
3272
|
|
|
3273 When doing just EOL detection, a coding system can be specified; if so,
|
|
|
3274 we will decode this data through the coding system before doing EOL
|
|
|
3275 detection. The reason for specifying this is so that
|
|
|
3276 canonicalize-after-coding works: We will canonicalize the specified
|
|
|
3277 coding system into the appropriate EOL type. When doing both coding and
|
|
|
3278 EOL detection, we do similar canonicalization, and also catch situations
|
|
|
3279 where the EOL type is overspecified, i.e. the detected coding system
|
|
|
3280 specifies an EOL type, and either switch to the equivalent
|
|
|
3281 non-EOL-processing coding system (if possible), or terminate EOL
|
|
|
3282 detection and use the specified EOL type. This prevents data from being
|
|
|
3283 EOL-processed twice.
|
|
|
3284 */
|
|
|
3285
|
|
|
3286 DEFINE_CODING_SYSTEM_TYPE (undecided);
|
|
|
3287
|
|
|
3288 struct undecided_coding_system
|
|
|
3289 {
|
|
|
3290 int do_eol, do_coding;
|
|
|
3291 Lisp_Object cs;
|
|
|
3292 };
|
|
|
3293
|
|
|
3294 struct undecided_coding_stream
|
|
|
3295 {
|
|
|
3296 Lisp_Object actual;
|
|
|
3297 /* Either 2 or 3 lstreams here; see undecided_convert */
|
|
|
3298 struct chain_coding_stream c;
|
|
|
3299
|
|
|
3300 struct detection_state *st;
|
|
|
3301 };
|
|
|
3302
|
|
|
3303 static const struct lrecord_description
|
|
|
3304 undecided_coding_system_description[] = {
|
|
|
3305 { XD_LISP_OBJECT,
|
|
|
3306 coding_system_data_offset + offsetof (struct undecided_coding_system,
|
|
|
3307 cs) },
|
|
|
3308 { XD_END }
|
|
|
3309 };
|
|
|
3310
|
|
|
3311 static void
|
|
|
3312 undecided_init (Lisp_Object codesys)
|
|
|
3313 {
|
|
|
3314 struct undecided_coding_system *data =
|
|
|
3315 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3316
|
|
|
3317 data->cs = Qnil;
|
|
|
3318 }
|
|
|
3319
|
|
|
3320 static void
|
|
|
3321 undecided_mark (Lisp_Object codesys)
|
|
|
3322 {
|
|
|
3323 struct undecided_coding_system *data =
|
|
|
3324 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3325
|
|
|
3326 mark_object (data->cs);
|
|
|
3327 }
|
|
|
3328
|
|
|
3329 static void
|
|
|
3330 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
3331 {
|
|
|
3332 struct undecided_coding_system *data =
|
|
|
3333 XCODING_SYSTEM_TYPE_DATA (cs, undecided);
|
|
|
3334 int need_space = 0;
|
|
|
3335
|
|
826
|
3336 write_c_string (printcharfun, "(");
|
|
771
|
3337 if (data->do_eol)
|
|
|
3338 {
|
|
826
|
3339 write_c_string (printcharfun, "do-eol");
|
|
771
|
3340 need_space = 1;
|
|
|
3341 }
|
|
|
3342 if (data->do_coding)
|
|
|
3343 {
|
|
|
3344 if (need_space)
|
|
826
|
3345 write_c_string (printcharfun, " ");
|
|
|
3346 write_c_string (printcharfun, "do-coding");
|
|
771
|
3347 need_space = 1;
|
|
|
3348 }
|
|
|
3349 if (!NILP (data->cs))
|
|
|
3350 {
|
|
|
3351 if (need_space)
|
|
826
|
3352 write_c_string (printcharfun, " ");
|
|
|
3353 write_c_string (printcharfun, "coding-system=");
|
|
771
|
3354 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag);
|
|
|
3355 }
|
|
826
|
3356 write_c_string (printcharfun, ")");
|
|
771
|
3357 }
|
|
|
3358
|
|
|
3359 static void
|
|
|
3360 undecided_mark_coding_stream (struct coding_stream *str)
|
|
|
3361 {
|
|
|
3362 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3363 }
|
|
|
3364
|
|
|
3365 static int
|
|
|
3366 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
3367 {
|
|
|
3368 struct undecided_coding_system *data =
|
|
|
3369 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3370
|
|
|
3371 if (EQ (key, Qdo_eol))
|
|
|
3372 data->do_eol = 1;
|
|
|
3373 else if (EQ (key, Qdo_coding))
|
|
|
3374 data->do_coding = 1;
|
|
|
3375 else if (EQ (key, Qcoding_system))
|
|
|
3376 data->cs = get_coding_system_for_text_file (value, 0);
|
|
|
3377 else
|
|
|
3378 return 0;
|
|
|
3379 return 1;
|
|
|
3380 }
|
|
|
3381
|
|
|
3382 static Lisp_Object
|
|
|
3383 undecided_getprop (Lisp_Object codesys, Lisp_Object prop)
|
|
|
3384 {
|
|
|
3385 struct undecided_coding_system *data =
|
|
|
3386 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3387
|
|
|
3388 if (EQ (prop, Qdo_eol))
|
|
|
3389 return data->do_eol ? Qt : Qnil;
|
|
|
3390 if (EQ (prop, Qdo_coding))
|
|
|
3391 return data->do_coding ? Qt : Qnil;
|
|
|
3392 if (EQ (prop, Qcoding_system))
|
|
|
3393 return data->cs;
|
|
|
3394 return Qunbound;
|
|
|
3395 }
|
|
|
3396
|
|
|
3397 static struct detection_state *
|
|
|
3398 allocate_detection_state (void)
|
|
|
3399 {
|
|
|
3400 int i;
|
|
|
3401 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3402 struct detection_state *block;
|
|
|
3403
|
|
|
3404 for (i = 0; i < coding_detector_count; i++)
|
|
|
3405 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3406
|
|
|
3407 block = (struct detection_state *) xmalloc_and_zero (size);
|
|
|
3408
|
|
|
3409 size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3410 for (i = 0; i < coding_detector_count; i++)
|
|
|
3411 {
|
|
|
3412 block->data_offset[i] = size;
|
|
|
3413 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3414 }
|
|
|
3415
|
|
|
3416 return block;
|
|
|
3417 }
|
|
|
3418
|
|
|
3419 static void
|
|
|
3420 free_detection_state (struct detection_state *st)
|
|
|
3421 {
|
|
|
3422 int i;
|
|
|
3423
|
|
|
3424 for (i = 0; i < coding_detector_count; i++)
|
|
|
3425 {
|
|
|
3426 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method)
|
|
|
3427 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method
|
|
|
3428 (st);
|
|
|
3429 }
|
|
|
3430
|
|
|
3431 xfree (st);
|
|
|
3432 }
|
|
|
3433
|
|
|
3434 static int
|
|
|
3435 coding_category_symbol_to_id (Lisp_Object symbol)
|
|
428
|
3436 {
|
|
|
3437 int i;
|
|
|
3438
|
|
|
3439 CHECK_SYMBOL (symbol);
|
|
771
|
3440 for (i = 0; i < coding_detector_count; i++)
|
|
|
3441 {
|
|
|
3442 detector_category_dynarr *cats =
|
|
|
3443 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3444 int j;
|
|
|
3445
|
|
|
3446 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3447 if (EQ (Dynarr_at (cats, j).sym, symbol))
|
|
|
3448 return Dynarr_at (cats, j).id;
|
|
|
3449 }
|
|
|
3450
|
|
563
|
3451 invalid_constant ("Unrecognized coding category", symbol);
|
|
801
|
3452 RETURN_NOT_REACHED (0)
|
|
428
|
3453 }
|
|
|
3454
|
|
771
|
3455 static Lisp_Object
|
|
|
3456 coding_category_id_to_symbol (int id)
|
|
428
|
3457 {
|
|
|
3458 int i;
|
|
771
|
3459
|
|
|
3460 for (i = 0; i < coding_detector_count; i++)
|
|
|
3461 {
|
|
|
3462 detector_category_dynarr *cats =
|
|
|
3463 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3464 int j;
|
|
|
3465
|
|
|
3466 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3467 if (id == Dynarr_at (cats, j).id)
|
|
|
3468 return Dynarr_at (cats, j).sym;
|
|
|
3469 }
|
|
|
3470
|
|
|
3471 abort ();
|
|
|
3472 return Qnil; /* (usually) not reached */
|
|
428
|
3473 }
|
|
|
3474
|
|
771
|
3475 static Lisp_Object
|
|
|
3476 detection_result_number_to_symbol (enum detection_result result)
|
|
428
|
3477 {
|
|
771
|
3478 #define FROB(sym, num) if (result == num) return (sym)
|
|
|
3479 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3480 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3481 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
|
3482 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3483 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3484 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3485 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3486 #undef FROB
|
|
|
3487
|
|
|
3488 abort ();
|
|
|
3489 return Qnil; /* (usually) not reached */
|
|
|
3490 }
|
|
|
3491
|
|
778
|
3492 #if 0 /* not used */
|
|
771
|
3493 static enum detection_result
|
|
|
3494 detection_result_symbol_to_number (Lisp_Object symbol)
|
|
|
3495 {
|
|
|
3496 #define FROB(sym, num) if (EQ (symbol, sym)) return (num)
|
|
|
3497 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3498 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3499 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
|
3500 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3501 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3502 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3503 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3504 #undef FROB
|
|
|
3505
|
|
|
3506 invalid_constant ("Unrecognized detection result", symbol);
|
|
|
3507 return ((enum detection_result) 0); /* not reached */
|
|
|
3508 }
|
|
778
|
3509 #endif /* 0 */
|
|
771
|
3510
|
|
|
3511 /* Set all detection results for a given detector to a specified value. */
|
|
|
3512 void
|
|
|
3513 set_detection_results (struct detection_state *st, int detector, int given)
|
|
|
3514 {
|
|
|
3515 detector_category_dynarr *cats =
|
|
|
3516 Dynarr_at (all_coding_detectors, detector).cats;
|
|
|
3517 int i;
|
|
|
3518
|
|
|
3519 for (i = 0; i < Dynarr_length (cats); i++)
|
|
|
3520 st->categories[Dynarr_at (cats, i).id] = given;
|
|
|
3521 }
|
|
428
|
3522
|
|
|
3523 static int
|
|
|
3524 acceptable_control_char_p (int c)
|
|
|
3525 {
|
|
|
3526 switch (c)
|
|
|
3527 {
|
|
|
3528 /* Allow and ignore control characters that you might
|
|
|
3529 reasonably see in a text file */
|
|
|
3530 case '\r':
|
|
|
3531 case '\n':
|
|
|
3532 case '\t':
|
|
|
3533 case 7: /* bell */
|
|
|
3534 case 8: /* backspace */
|
|
|
3535 case 11: /* vertical tab */
|
|
|
3536 case 12: /* form feed */
|
|
|
3537 case 26: /* MS-DOS C-z junk */
|
|
|
3538 case 31: /* '^_' -- for info */
|
|
|
3539 return 1;
|
|
|
3540 default:
|
|
|
3541 return 0;
|
|
|
3542 }
|
|
|
3543 }
|
|
|
3544
|
|
771
|
3545 #ifdef DEBUG_XEMACS
|
|
|
3546
|
|
|
3547 static UExtbyte
|
|
|
3548 hex_digit_to_char (int digit)
|
|
428
|
3549 {
|
|
771
|
3550 if (digit < 10)
|
|
|
3551 return digit + '0';
|
|
|
3552 else
|
|
|
3553 return digit - 10 + 'A';
|
|
428
|
3554 }
|
|
|
3555
|
|
771
|
3556 static void
|
|
|
3557 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n)
|
|
428
|
3558 {
|
|
771
|
3559 UExtbyte *ascii = alloca_array (UExtbyte, n + 1);
|
|
|
3560 UExtbyte *hex = alloca_array (UExtbyte, 3 * n + 1);
|
|
|
3561 int i;
|
|
|
3562
|
|
|
3563 for (i = 0; i < n; i++)
|
|
428
|
3564 {
|
|
771
|
3565 UExtbyte c = src[i];
|
|
|
3566 if (c < 0x20)
|
|
|
3567 ascii[i] = '.';
|
|
428
|
3568 else
|
|
771
|
3569 ascii[i] = c;
|
|
|
3570 hex[3 * i] = hex_digit_to_char (c >> 4);
|
|
|
3571 hex[3 * i + 1] = hex_digit_to_char (c & 0xF);
|
|
|
3572 hex[3 * i + 2] = ' ';
|
|
428
|
3573 }
|
|
771
|
3574 ascii[i] = '\0';
|
|
|
3575 hex[3 * i - 1] = '\0';
|
|
|
3576 stderr_out ("%s %s", ascii, hex);
|
|
428
|
3577 }
|
|
|
3578
|
|
771
|
3579 #endif /* DEBUG_XEMACS */
|
|
|
3580
|
|
|
3581 /* Attempt to determine the encoding of the given text. Before calling
|
|
|
3582 this function for the first time, you must zero out the detection state.
|
|
428
|
3583
|
|
|
3584 Returns:
|
|
|
3585
|
|
771
|
3586 0 == keep going
|
|
|
3587 1 == stop
|
|
428
|
3588 */
|
|
|
3589
|
|
|
3590 static int
|
|
771
|
3591 detect_coding_type (struct detection_state *st, const UExtbyte *src,
|
|
|
3592 Bytecount n)
|
|
428
|
3593 {
|
|
771
|
3594 Bytecount n2 = n;
|
|
|
3595 const UExtbyte *src2 = src;
|
|
|
3596 int i;
|
|
|
3597
|
|
|
3598 #ifdef DEBUG_XEMACS
|
|
|
3599 if (!NILP (Vdebug_coding_detection))
|
|
|
3600 {
|
|
|
3601 int bytes = min (16, n);
|
|
|
3602 stderr_out ("detect_coding_type: processing %ld bytes\n", n);
|
|
|
3603 stderr_out ("First %d: ", bytes);
|
|
|
3604 output_bytes_in_ascii_and_hex (src, bytes);
|
|
|
3605 stderr_out ("\nLast %d: ", bytes);
|
|
|
3606 output_bytes_in_ascii_and_hex (src + n - bytes, bytes);
|
|
|
3607 stderr_out ("\n");
|
|
|
3608 }
|
|
|
3609 #endif /* DEBUG_XEMACS */
|
|
428
|
3610 if (!st->seen_non_ascii)
|
|
|
3611 {
|
|
771
|
3612 for (; n2; n2--, src2++)
|
|
428
|
3613 {
|
|
771
|
3614 UExtbyte c = *src2;
|
|
428
|
3615 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
3616 {
|
|
|
3617 st->seen_non_ascii = 1;
|
|
|
3618 break;
|
|
|
3619 }
|
|
|
3620 }
|
|
|
3621 }
|
|
|
3622
|
|
771
|
3623 for (i = 0; i < coding_detector_count; i++)
|
|
|
3624 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n);
|
|
|
3625
|
|
|
3626 st->bytes_seen += n;
|
|
|
3627
|
|
|
3628 #ifdef DEBUG_XEMACS
|
|
|
3629 if (!NILP (Vdebug_coding_detection))
|
|
|
3630 {
|
|
|
3631 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii);
|
|
|
3632 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3633 stderr_out_lisp
|
|
|
3634 ("%s: %s\n",
|
|
|
3635 2,
|
|
|
3636 coding_category_id_to_symbol (i),
|
|
|
3637 detection_result_number_to_symbol ((enum detection_result)
|
|
|
3638 st->categories[i]));
|
|
|
3639 }
|
|
|
3640 #endif /* DEBUG_XEMACS */
|
|
|
3641
|
|
|
3642 {
|
|
|
3643 int not_unlikely = 0;
|
|
|
3644 int retval;
|
|
|
3645
|
|
|
3646 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3647 if (st->categories[i] >= 0)
|
|
|
3648 not_unlikely++;
|
|
|
3649
|
|
|
3650 retval = (not_unlikely <= 1
|
|
|
3651 #if 0 /* this is bogus */
|
|
|
3652 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION
|
|
428
|
3653 #endif
|
|
771
|
3654 );
|
|
|
3655
|
|
|
3656 #ifdef DEBUG_XEMACS
|
|
|
3657 if (!NILP (Vdebug_coding_detection))
|
|
|
3658 stderr_out ("detect_coding_type: returning %d (%s)\n",
|
|
|
3659 retval, retval ? "stop" : "keep going");
|
|
|
3660 #endif /* DEBUG_XEMACS */
|
|
|
3661
|
|
|
3662 return retval;
|
|
428
|
3663 }
|
|
|
3664 }
|
|
|
3665
|
|
|
3666 static Lisp_Object
|
|
771
|
3667 detected_coding_system (struct detection_state *st)
|
|
428
|
3668 {
|
|
771
|
3669 int i;
|
|
|
3670 int even = 1;
|
|
|
3671
|
|
|
3672 if (st->seen_non_ascii)
|
|
|
3673 {
|
|
|
3674 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3675 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3676 {
|
|
|
3677 even = 0;
|
|
|
3678 break;
|
|
|
3679 }
|
|
|
3680 }
|
|
|
3681
|
|
|
3682 /* #### Here we are ignoring the results of detection when it's all
|
|
|
3683 ASCII. This is obviously a bad thing. But we need to fix up the
|
|
|
3684 existing detection methods somewhat before we can switch. */
|
|
|
3685 if (even)
|
|
428
|
3686 {
|
|
|
3687 /* If the file was entirely or basically ASCII, use the
|
|
|
3688 default value of `buffer-file-coding-system'. */
|
|
|
3689 Lisp_Object retval =
|
|
|
3690 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
3691 if (!NILP (retval))
|
|
|
3692 {
|
|
771
|
3693 retval = find_coding_system_for_text_file (retval, 0);
|
|
428
|
3694 if (NILP (retval))
|
|
|
3695 {
|
|
|
3696 warn_when_safe
|
|
|
3697 (Qbad_variable, Qwarning,
|
|
|
3698 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
3699 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
3700 }
|
|
|
3701 }
|
|
|
3702 if (NILP (retval))
|
|
|
3703 retval = Fget_coding_system (Qraw_text);
|
|
|
3704 return retval;
|
|
|
3705 }
|
|
|
3706 else
|
|
|
3707 {
|
|
771
|
3708 int likelihood;
|
|
|
3709 Lisp_Object retval = Qnil;
|
|
|
3710
|
|
|
3711 /* Look through the coding categories first by likelihood and then by
|
|
|
3712 priority and find the first one that is allowed. */
|
|
|
3713
|
|
|
3714 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--)
|
|
428
|
3715 {
|
|
771
|
3716 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3717 {
|
|
|
3718 int cat = coding_category_by_priority[i];
|
|
|
3719 if (st->categories[cat] == likelihood &&
|
|
|
3720 !NILP (coding_category_system[cat]))
|
|
|
3721 {
|
|
|
3722 retval = (get_coding_system_for_text_file
|
|
|
3723 (coding_category_system[cat], 0));
|
|
|
3724 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3725 warn_when_safe_lispobj
|
|
|
3726 (intern ("detection"),
|
|
793
|
3727 Qwarning,
|
|
771
|
3728 emacs_sprintf_string_lisp
|
|
|
3729 (
|
|
|
3730 "Detected coding %s is unlikely to be correct (likelihood == `%s')",
|
|
|
3731 Qnil, 2, XCODING_SYSTEM_NAME (retval),
|
|
|
3732 detection_result_number_to_symbol
|
|
|
3733 ((enum detection_result) likelihood)));
|
|
|
3734 return retval;
|
|
|
3735 }
|
|
|
3736 }
|
|
428
|
3737 }
|
|
771
|
3738
|
|
|
3739 return Fget_coding_system (Qraw_text);
|
|
428
|
3740 }
|
|
|
3741 }
|
|
|
3742
|
|
|
3743 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
3744 as specified, do any autodetection that is called for. If the
|
|
|
3745 coding system and/or EOL type are not `autodetect', they will be left
|
|
|
3746 alone; but this function will never return an autodetect coding system
|
|
|
3747 or EOL type.
|
|
|
3748
|
|
|
3749 This function does not automatically fetch subsidiary coding systems;
|
|
|
3750 that should be unnecessary with the explicit eol-type argument. */
|
|
|
3751
|
|
|
3752 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
3753
|
|
771
|
3754 static Lisp_Object
|
|
|
3755 unwind_free_detection_state (Lisp_Object opaque)
|
|
|
3756 {
|
|
|
3757 struct detection_state *st =
|
|
|
3758 (struct detection_state *) get_opaque_ptr (opaque);
|
|
|
3759 free_detection_state (st);
|
|
|
3760 free_opaque_ptr (opaque);
|
|
|
3761 return Qnil;
|
|
|
3762 }
|
|
|
3763
|
|
|
3764 static Lisp_Object
|
|
|
3765 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len)
|
|
428
|
3766 {
|
|
771
|
3767 Lisp_Object coding_system = Qnil;
|
|
|
3768 const UExtbyte *p;
|
|
|
3769 const UExtbyte *scan_end;
|
|
|
3770
|
|
|
3771 /* Look for initial "-*-"; mode line prefix */
|
|
|
3772 for (p = data,
|
|
|
3773 scan_end = data + len - LENGTH ("-*-coding:?-*-");
|
|
|
3774 p <= scan_end
|
|
|
3775 && *p != '\n'
|
|
|
3776 && *p != '\r';
|
|
|
3777 p++)
|
|
|
3778 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3779 {
|
|
|
3780 const UExtbyte *local_vars_beg = p + 3;
|
|
|
3781 /* Look for final "-*-"; mode line suffix */
|
|
|
3782 for (p = local_vars_beg,
|
|
|
3783 scan_end = data + len - LENGTH ("-*-");
|
|
|
3784 p <= scan_end
|
|
428
|
3785 && *p != '\n'
|
|
|
3786 && *p != '\r';
|
|
771
|
3787 p++)
|
|
|
3788 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3789 {
|
|
|
3790 const UExtbyte *suffix = p;
|
|
|
3791 /* Look for "coding:" */
|
|
|
3792 for (p = local_vars_beg,
|
|
|
3793 scan_end = suffix - LENGTH ("coding:?");
|
|
|
3794 p <= scan_end;
|
|
|
3795 p++)
|
|
|
3796 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
3797 && (p == local_vars_beg
|
|
|
3798 || (*(p-1) == ' ' ||
|
|
|
3799 *(p-1) == '\t' ||
|
|
|
3800 *(p-1) == ';')))
|
|
|
3801 {
|
|
|
3802 Bytecount n;
|
|
867
|
3803 Ibyte *name;
|
|
771
|
3804
|
|
|
3805 p += LENGTH ("coding:");
|
|
|
3806 while (*p == ' ' || *p == '\t') p++;
|
|
867
|
3807 name = alloca_ibytes (suffix - p + 1);
|
|
771
|
3808 memcpy (name, p, suffix - p);
|
|
|
3809 name[suffix - p] = '\0';
|
|
|
3810
|
|
|
3811 /* Get coding system name */
|
|
|
3812 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
3813 and in a Lisp symbol name. */
|
|
|
3814 n = qxestrspn (name,
|
|
|
3815 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
3816 "abcdefghijklmnopqrstuvwxyz"
|
|
|
3817 "0123456789"
|
|
|
3818 "!$%&*+-.^_{|}~");
|
|
|
3819 if (n > 0)
|
|
428
|
3820 {
|
|
771
|
3821 name[n] = '\0';
|
|
|
3822 coding_system =
|
|
|
3823 find_coding_system_for_text_file (intern_int (name),
|
|
|
3824 0);
|
|
428
|
3825 }
|
|
771
|
3826 break;
|
|
|
3827 }
|
|
|
3828 break;
|
|
|
3829 }
|
|
|
3830 break;
|
|
|
3831 }
|
|
|
3832
|
|
|
3833 return coding_system;
|
|
|
3834 }
|
|
|
3835
|
|
|
3836 static Lisp_Object
|
|
|
3837 determine_real_coding_system (Lstream *stream)
|
|
|
3838 {
|
|
|
3839 struct detection_state *st = allocate_detection_state ();
|
|
|
3840 int depth = record_unwind_protect (unwind_free_detection_state,
|
|
|
3841 make_opaque_ptr (st));
|
|
|
3842 UExtbyte buf[4096];
|
|
|
3843 Bytecount nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3844 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread);
|
|
|
3845
|
|
|
3846 if (NILP (coding_system))
|
|
|
3847 {
|
|
|
3848 while (1)
|
|
|
3849 {
|
|
|
3850 if (detect_coding_type (st, buf, nread))
|
|
428
|
3851 break;
|
|
771
|
3852 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3853 if (nread == 0)
|
|
|
3854 break;
|
|
428
|
3855 }
|
|
771
|
3856
|
|
|
3857 coding_system = detected_coding_system (st);
|
|
428
|
3858 }
|
|
|
3859
|
|
|
3860 Lstream_rewind (stream);
|
|
771
|
3861
|
|
|
3862 unbind_to (depth);
|
|
|
3863 return coding_system;
|
|
|
3864 }
|
|
|
3865
|
|
|
3866 static void
|
|
|
3867 undecided_init_coding_stream (struct coding_stream *str)
|
|
|
3868 {
|
|
|
3869 struct undecided_coding_stream *data =
|
|
|
3870 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3871 struct undecided_coding_system *csdata =
|
|
|
3872 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3873
|
|
|
3874 data->actual = Qnil;
|
|
|
3875
|
|
|
3876 if (str->direction == CODING_DECODE)
|
|
|
3877 {
|
|
|
3878 Lstream *lst = str->other_end;
|
|
|
3879
|
|
|
3880 if ((lst->flags & LSTREAM_FL_READ) &&
|
|
|
3881 Lstream_seekable_p (lst) &&
|
|
|
3882 csdata->do_coding)
|
|
|
3883 /* We can determine the coding system now. */
|
|
|
3884 data->actual = determine_real_coding_system (lst);
|
|
|
3885 }
|
|
|
3886 }
|
|
|
3887
|
|
|
3888 static void
|
|
|
3889 undecided_rewind_coding_stream (struct coding_stream *str)
|
|
|
3890 {
|
|
|
3891 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3892 }
|
|
|
3893
|
|
|
3894 static void
|
|
|
3895 undecided_finalize_coding_stream (struct coding_stream *str)
|
|
|
3896 {
|
|
|
3897 struct undecided_coding_stream *data =
|
|
|
3898 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3899
|
|
|
3900 chain_finalize_coding_stream_1
|
|
|
3901 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3902 if (data->st)
|
|
|
3903 free_detection_state (data->st);
|
|
|
3904 }
|
|
|
3905
|
|
|
3906 static Lisp_Object
|
|
|
3907 undecided_canonicalize (Lisp_Object codesys)
|
|
|
3908 {
|
|
|
3909 struct undecided_coding_system *csdata =
|
|
|
3910 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3911 if (!csdata->do_eol && !csdata->do_coding)
|
|
|
3912 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs;
|
|
|
3913 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs))
|
|
|
3914 return Fget_coding_system (Qconvert_eol_autodetect);
|
|
|
3915 return codesys;
|
|
|
3916 }
|
|
|
3917
|
|
|
3918 static Bytecount
|
|
|
3919 undecided_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
3920 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
3921 {
|
|
|
3922 int first_time = 0;
|
|
|
3923
|
|
|
3924 if (str->direction == CODING_DECODE)
|
|
|
3925 {
|
|
|
3926 /* At this point, we have only the following possibilities:
|
|
|
3927
|
|
|
3928 do_eol && do_coding
|
|
|
3929 do_coding only
|
|
|
3930 do_eol only and a coding system was specified
|
|
|
3931
|
|
|
3932 Other possibilities are removed during undecided_canonicalize.
|
|
|
3933
|
|
|
3934 Therefore, our substreams are either
|
|
|
3935
|
|
|
3936 lstream_coding -> lstream_dynarr, or
|
|
|
3937 lstream_coding -> lstream_eol -> lstream_dynarr.
|
|
|
3938 */
|
|
|
3939 struct undecided_coding_system *csdata =
|
|
|
3940 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3941 struct undecided_coding_stream *data =
|
|
|
3942 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3943
|
|
|
3944 if (str->eof)
|
|
|
3945 {
|
|
|
3946 /* Each will close the next. We need to close now because more
|
|
|
3947 data may be generated. */
|
|
|
3948 if (data->c.initted)
|
|
|
3949 Lstream_close (XLSTREAM (data->c.lstreams[0]));
|
|
|
3950 return n;
|
|
|
3951 }
|
|
|
3952
|
|
|
3953 if (!data->c.initted)
|
|
|
3954 {
|
|
|
3955 data->c.lstream_count = csdata->do_eol ? 3 : 2;
|
|
|
3956 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count);
|
|
|
3957
|
|
|
3958 data->c.lstreams[data->c.lstream_count - 1] =
|
|
|
3959 make_dynarr_output_stream (dst);
|
|
|
3960 Lstream_set_buffering
|
|
|
3961 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3962 LSTREAM_UNBUFFERED, 0);
|
|
|
3963 if (csdata->do_eol)
|
|
|
3964 {
|
|
|
3965 data->c.lstreams[1] =
|
|
|
3966 make_coding_output_stream
|
|
|
3967 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3968 Fget_coding_system (Qconvert_eol_autodetect),
|
|
800
|
3969 CODING_DECODE, 0);
|
|
771
|
3970 Lstream_set_buffering
|
|
|
3971 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3972 LSTREAM_UNBUFFERED, 0);
|
|
|
3973 }
|
|
|
3974
|
|
|
3975 data->c.lstreams[0] =
|
|
|
3976 make_coding_output_stream
|
|
|
3977 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3978 /* Substitute binary if we need to detect the encoding */
|
|
|
3979 csdata->do_coding ? Qbinary : csdata->cs,
|
|
800
|
3980 CODING_DECODE, 0);
|
|
771
|
3981 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]),
|
|
|
3982 LSTREAM_UNBUFFERED, 0);
|
|
|
3983
|
|
|
3984 first_time = 1;
|
|
|
3985 data->c.initted = 1;
|
|
|
3986 }
|
|
|
3987
|
|
|
3988 /* If necessary, do encoding-detection now. We do this when we're a
|
|
|
3989 writing stream or a non-seekable reading stream, meaning that we
|
|
|
3990 can't just process the whole input, rewind, and start over. */
|
|
|
3991
|
|
|
3992 if (csdata->do_coding)
|
|
|
3993 {
|
|
|
3994 int actual_was_nil = NILP (data->actual);
|
|
|
3995 if (NILP (data->actual))
|
|
|
3996 {
|
|
|
3997 if (!data->st)
|
|
|
3998 data->st = allocate_detection_state ();
|
|
|
3999 if (first_time)
|
|
|
4000 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
4001 up a certain minimum amount of data to get a better result.
|
|
|
4002 */
|
|
|
4003 data->actual = look_for_coding_system_magic_cookie (src, n);
|
|
|
4004 if (NILP (data->actual))
|
|
|
4005 {
|
|
|
4006 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
4007 up a certain minimum amount of data so as to get a less
|
|
|
4008 random result when doing subprocess detection. */
|
|
|
4009 detect_coding_type (data->st, src, n);
|
|
|
4010 data->actual = detected_coding_system (data->st);
|
|
|
4011 }
|
|
|
4012 }
|
|
|
4013 /* We need to set the detected coding system if we actually have
|
|
|
4014 such a coding system but didn't before. That is the case
|
|
|
4015 either when we just detected it in the previous code or when
|
|
|
4016 it was detected during undecided_init_coding_stream(). We
|
|
|
4017 can check for that using first_time. */
|
|
|
4018 if (!NILP (data->actual) && (actual_was_nil || first_time))
|
|
|
4019 {
|
|
|
4020 /* If the detected coding system doesn't allow for EOL
|
|
|
4021 autodetection, try to get the equivalent that does;
|
|
|
4022 otherwise, disable EOL detection (overriding whatever
|
|
|
4023 may already have been detected). */
|
|
|
4024 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT)
|
|
|
4025 {
|
|
|
4026 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual)))
|
|
|
4027 data->actual =
|
|
|
4028 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual);
|
|
|
4029 else if (data->c.lstream_count == 3)
|
|
|
4030 set_coding_stream_coding_system
|
|
|
4031 (XLSTREAM (data->c.lstreams[1]),
|
|
|
4032 Fget_coding_system (Qidentity));
|
|
|
4033 }
|
|
|
4034 set_coding_stream_coding_system
|
|
|
4035 (XLSTREAM (data->c.lstreams[0]), data->actual);
|
|
|
4036 }
|
|
|
4037 }
|
|
|
4038
|
|
|
4039 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0)
|
|
|
4040 return -1;
|
|
|
4041 return n;
|
|
|
4042 }
|
|
|
4043 else
|
|
|
4044 return no_conversion_convert (str, src, dst, n);
|
|
|
4045 }
|
|
|
4046
|
|
|
4047 static Lisp_Object
|
|
|
4048 undecided_canonicalize_after_coding (struct coding_stream *str)
|
|
|
4049 {
|
|
|
4050 struct undecided_coding_stream *data =
|
|
|
4051 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
4052 Lisp_Object ret, eolret;
|
|
|
4053
|
|
|
4054 if (str->direction == CODING_ENCODE)
|
|
|
4055 return str->codesys;
|
|
|
4056
|
|
|
4057 if (!data->c.initted)
|
|
|
4058 return Fget_coding_system (Qundecided);
|
|
|
4059
|
|
|
4060 ret = coding_stream_canonicalize_after_coding
|
|
|
4061 (XLSTREAM (data->c.lstreams[0]));
|
|
|
4062 if (NILP (ret))
|
|
|
4063 ret = Fget_coding_system (Qundecided);
|
|
|
4064 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT)
|
|
|
4065 return ret;
|
|
|
4066 eolret = coding_stream_canonicalize_after_coding
|
|
|
4067 (XLSTREAM (data->c.lstreams[1]));
|
|
|
4068 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol))
|
|
|
4069 return ret;
|
|
|
4070 return
|
|
|
4071 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret,
|
|
|
4072 Qsubtype));
|
|
|
4073 }
|
|
|
4074
|
|
|
4075
|
|
|
4076 /************************************************************************/
|
|
|
4077 /* Lisp interface: Coding category functions and detection */
|
|
|
4078 /************************************************************************/
|
|
|
4079
|
|
|
4080 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
4081 Return a list of all recognized coding categories.
|
|
|
4082 */
|
|
|
4083 ())
|
|
|
4084 {
|
|
|
4085 int i;
|
|
|
4086 Lisp_Object list = Qnil;
|
|
|
4087
|
|
|
4088 for (i = 0; i < coding_detector_count; i++)
|
|
|
4089 {
|
|
|
4090 detector_category_dynarr *cats =
|
|
|
4091 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
4092 int j;
|
|
|
4093
|
|
|
4094 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
4095 list = Fcons (Dynarr_at (cats, j).sym, list);
|
|
|
4096 }
|
|
|
4097
|
|
|
4098 return Fnreverse (list);
|
|
|
4099 }
|
|
|
4100
|
|
|
4101 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
4102 Change the priority order of the coding categories.
|
|
|
4103 LIST should be list of coding categories, in descending order of
|
|
|
4104 priority. Unspecified coding categories will be lower in priority
|
|
|
4105 than all specified ones, in the same relative order they were in
|
|
|
4106 previously.
|
|
|
4107 */
|
|
|
4108 (list))
|
|
|
4109 {
|
|
|
4110 int *category_to_priority =
|
|
|
4111 alloca_array (int, coding_detector_category_count);
|
|
|
4112 int i, j;
|
|
|
4113 Lisp_Object rest;
|
|
|
4114
|
|
|
4115 /* First generate a list that maps coding categories to priorities. */
|
|
|
4116
|
|
|
4117 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4118 category_to_priority[i] = -1;
|
|
|
4119
|
|
|
4120 /* Highest priority comes from the specified list. */
|
|
|
4121 i = 0;
|
|
|
4122 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
4123 {
|
|
|
4124 int cat = coding_category_symbol_to_id (XCAR (rest));
|
|
|
4125
|
|
|
4126 if (category_to_priority[cat] >= 0)
|
|
|
4127 sferror ("Duplicate coding category in list", XCAR (rest));
|
|
|
4128 category_to_priority[cat] = i++;
|
|
|
4129 }
|
|
|
4130
|
|
|
4131 /* Now go through the existing categories by priority to retrieve
|
|
|
4132 the categories not yet specified and preserve their priority
|
|
|
4133 order. */
|
|
|
4134 for (j = 0; j < coding_detector_category_count; j++)
|
|
|
4135 {
|
|
|
4136 int cat = coding_category_by_priority[j];
|
|
|
4137 if (category_to_priority[cat] < 0)
|
|
|
4138 category_to_priority[cat] = i++;
|
|
|
4139 }
|
|
|
4140
|
|
|
4141 /* Now we need to construct the inverse of the mapping we just
|
|
|
4142 constructed. */
|
|
|
4143
|
|
|
4144 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4145 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
4146
|
|
|
4147 /* Phew! That was confusing. */
|
|
|
4148 return Qnil;
|
|
|
4149 }
|
|
|
4150
|
|
|
4151 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
4152 Return a list of coding categories in descending order of priority.
|
|
|
4153 */
|
|
|
4154 ())
|
|
|
4155 {
|
|
|
4156 int i;
|
|
|
4157 Lisp_Object list = Qnil;
|
|
|
4158
|
|
|
4159 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4160 list =
|
|
|
4161 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]),
|
|
|
4162 list);
|
|
|
4163 return Fnreverse (list);
|
|
|
4164 }
|
|
|
4165
|
|
|
4166 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
4167 Change the coding system associated with a coding category.
|
|
|
4168 */
|
|
|
4169 (coding_category, coding_system))
|
|
|
4170 {
|
|
|
4171 coding_category_system[coding_category_symbol_to_id (coding_category)] =
|
|
|
4172 Fget_coding_system (coding_system);
|
|
|
4173 return Qnil;
|
|
|
4174 }
|
|
|
4175
|
|
|
4176 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
4177 Return the coding system associated with a coding category.
|
|
|
4178 */
|
|
|
4179 (coding_category))
|
|
|
4180 {
|
|
|
4181 Lisp_Object sys =
|
|
|
4182 coding_category_system[coding_category_symbol_to_id (coding_category)];
|
|
|
4183
|
|
|
4184 if (!NILP (sys))
|
|
|
4185 return XCODING_SYSTEM_NAME (sys);
|
|
|
4186 return Qnil;
|
|
|
4187 }
|
|
|
4188
|
|
800
|
4189 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will
|
|
|
4190 read through to the end of STREAM, leaving it there but open. */
|
|
|
4191
|
|
771
|
4192 Lisp_Object
|
|
|
4193 detect_coding_stream (Lisp_Object stream)
|
|
|
4194 {
|
|
|
4195 Lisp_Object val = Qnil;
|
|
|
4196 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4197 UExtbyte random_buffer[65536];
|
|
|
4198 Lisp_Object binary_instream =
|
|
|
4199 make_coding_input_stream
|
|
|
4200 (XLSTREAM (stream), Qbinary,
|
|
814
|
4201 CODING_ENCODE, LSTREAM_FL_NO_CLOSE_OTHER);
|
|
771
|
4202 Lisp_Object decstream =
|
|
|
4203 make_coding_input_stream
|
|
|
4204 (XLSTREAM (binary_instream),
|
|
800
|
4205 Qundecided, CODING_DECODE, 0);
|
|
771
|
4206 Lstream *decstr = XLSTREAM (decstream);
|
|
|
4207
|
|
|
4208 GCPRO3 (decstream, stream, binary_instream);
|
|
|
4209 /* Read and discard all data; detection happens as a side effect of this,
|
|
|
4210 and we examine what was detected afterwards. */
|
|
|
4211 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0)
|
|
|
4212 ;
|
|
|
4213
|
|
|
4214 val = coding_stream_detected_coding_system (decstr);
|
|
|
4215 Lstream_close (decstr);
|
|
|
4216 Lstream_delete (decstr);
|
|
|
4217 Lstream_delete (XLSTREAM (binary_instream));
|
|
|
4218 UNGCPRO;
|
|
|
4219 return val;
|
|
428
|
4220 }
|
|
|
4221
|
|
|
4222 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
4223 Detect coding system of the text in the region between START and END.
|
|
444
|
4224 Return a list of possible coding systems ordered by priority.
|
|
|
4225 If only ASCII characters are found, return 'undecided or one of
|
|
428
|
4226 its subsidiary coding systems according to a detected end-of-line
|
|
|
4227 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
4228 */
|
|
|
4229 (start, end, buffer))
|
|
|
4230 {
|
|
|
4231 Lisp_Object val = Qnil;
|
|
|
4232 struct buffer *buf = decode_buffer (buffer, 0);
|
|
665
|
4233 Charbpos b, e;
|
|
771
|
4234 Lisp_Object lb_instream;
|
|
428
|
4235
|
|
|
4236 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
4237 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
771
|
4238
|
|
|
4239 val = detect_coding_stream (lb_instream);
|
|
|
4240 Lstream_delete (XLSTREAM (lb_instream));
|
|
428
|
4241 return val;
|
|
|
4242 }
|
|
|
4243
|
|
|
4244
|
|
771
|
4245
|
|
|
4246 #ifdef DEBUG_XEMACS
|
|
|
4247
|
|
428
|
4248 /************************************************************************/
|
|
771
|
4249 /* Internal methods */
|
|
|
4250 /************************************************************************/
|
|
|
4251
|
|
|
4252 /* Raw (internally-formatted) data. */
|
|
|
4253 DEFINE_CODING_SYSTEM_TYPE (internal);
|
|
428
|
4254
|
|
665
|
4255 static Bytecount
|
|
771
|
4256 internal_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
4257 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
4258 {
|
|
|
4259 Bytecount orign = n;
|
|
|
4260 Dynarr_add_many (dst, src, n);
|
|
|
4261 return orign;
|
|
|
4262 }
|
|
|
4263
|
|
|
4264 #endif /* DEBUG_XEMACS */
|
|
|
4265
|
|
|
4266
|
|
|
4267
|
|
|
4268 #ifdef HAVE_ZLIB
|
|
|
4269
|
|
|
4270 /************************************************************************/
|
|
|
4271 /* Gzip methods */
|
|
|
4272 /************************************************************************/
|
|
|
4273
|
|
|
4274 DEFINE_CODING_SYSTEM_TYPE (gzip);
|
|
|
4275
|
|
|
4276 struct gzip_coding_system
|
|
428
|
4277 {
|
|
771
|
4278 int level; /* 0 through 9, or -1 for default */
|
|
|
4279 };
|
|
|
4280
|
|
|
4281 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4282 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4283 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4284 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4285
|
|
|
4286 struct gzip_coding_stream
|
|
428
|
4287 {
|
|
771
|
4288 z_stream stream;
|
|
|
4289 int stream_initted;
|
|
|
4290 int reached_eof; /* #### this should be handled by the caller, once we
|
|
|
4291 return LSTREAM_EOF */
|
|
|
4292 };
|
|
|
4293
|
|
|
4294 static const struct lrecord_description
|
|
|
4295 gzip_coding_system_description[] = {
|
|
|
4296 { XD_END }
|
|
|
4297 };
|
|
|
4298
|
|
|
4299 enum source_sink_type
|
|
|
4300 gzip_conversion_end_type (Lisp_Object codesys)
|
|
|
4301 {
|
|
|
4302 return DECODES_BYTE_TO_BYTE;
|
|
428
|
4303 }
|
|
|
4304
|
|
|
4305 static void
|
|
771
|
4306 gzip_init (Lisp_Object codesys)
|
|
|
4307 {
|
|
|
4308 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4309 data->level = -1;
|
|
|
4310 }
|
|
|
4311
|
|
|
4312 static void
|
|
|
4313 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
428
|
4314 {
|
|
771
|
4315 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip);
|
|
|
4316
|
|
826
|
4317 write_c_string (printcharfun, "(");
|
|
771
|
4318 if (data->level == -1)
|
|
826
|
4319 write_c_string (printcharfun, "default");
|
|
771
|
4320 else
|
|
|
4321 print_internal (make_int (data->level), printcharfun, 0);
|
|
826
|
4322 write_c_string (printcharfun, ")");
|
|
428
|
4323 }
|
|
|
4324
|
|
|
4325 static int
|
|
771
|
4326 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
428
|
4327 {
|
|
771
|
4328 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4329
|
|
|
4330 if (EQ (key, Qlevel))
|
|
428
|
4331 {
|
|
771
|
4332 if (EQ (value, Qdefault))
|
|
|
4333 data->level = -1;
|
|
|
4334 else
|
|
428
|
4335 {
|
|
771
|
4336 CHECK_INT (value);
|
|
|
4337 check_int_range (XINT (value), 0, 9);
|
|
|
4338 data->level = XINT (value);
|
|
428
|
4339 }
|
|
|
4340 }
|
|
|
4341 else
|
|
771
|
4342 return 0;
|
|
|
4343 return 1;
|
|
428
|
4344 }
|
|
|
4345
|
|
|
4346 static Lisp_Object
|
|
771
|
4347 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
428
|
4348 {
|
|
771
|
4349 struct gzip_coding_system *data =
|
|
|
4350 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip);
|
|
|
4351
|
|
|
4352 if (EQ (prop, Qlevel))
|
|
428
|
4353 {
|
|
771
|
4354 if (data->level == -1)
|
|
|
4355 return Qdefault;
|
|
|
4356 return make_int (data->level);
|
|
428
|
4357 }
|
|
771
|
4358
|
|
|
4359 return Qunbound;
|
|
428
|
4360 }
|
|
|
4361
|
|
|
4362 static void
|
|
771
|
4363 gzip_init_coding_stream (struct coding_stream *str)
|
|
428
|
4364 {
|
|
771
|
4365 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4366 if (data->stream_initted)
|
|
428
|
4367 {
|
|
771
|
4368 if (str->direction == CODING_DECODE)
|
|
|
4369 inflateEnd (&data->stream);
|
|
|
4370 else
|
|
|
4371 deflateEnd (&data->stream);
|
|
|
4372 data->stream_initted = 0;
|
|
428
|
4373 }
|
|
771
|
4374 data->reached_eof = 0;
|
|
428
|
4375 }
|
|
|
4376
|
|
|
4377 static void
|
|
771
|
4378 gzip_rewind_coding_stream (struct coding_stream *str)
|
|
428
|
4379 {
|
|
771
|
4380 gzip_init_coding_stream (str);
|
|
428
|
4381 }
|
|
|
4382
|
|
771
|
4383 static Bytecount
|
|
|
4384 gzip_convert (struct coding_stream *str,
|
|
|
4385 const UExtbyte *src,
|
|
|
4386 unsigned_char_dynarr *dst, Bytecount n)
|
|
428
|
4387 {
|
|
771
|
4388 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4389 int zerr;
|
|
|
4390 if (str->direction == CODING_DECODE)
|
|
428
|
4391 {
|
|
771
|
4392 if (data->reached_eof)
|
|
|
4393 return n; /* eat the data */
|
|
|
4394
|
|
|
4395 if (!data->stream_initted)
|
|
428
|
4396 {
|
|
771
|
4397 xzero (data->stream);
|
|
|
4398 if (inflateInit (&data->stream) != Z_OK)
|
|
|
4399 return LSTREAM_ERROR;
|
|
|
4400 data->stream_initted = 1;
|
|
428
|
4401 }
|
|
771
|
4402
|
|
|
4403 data->stream.next_in = (Bytef *) src;
|
|
|
4404 data->stream.avail_in = n;
|
|
|
4405
|
|
|
4406 /* Normally we stop when we've fed all data to the decompressor; but
|
|
|
4407 if we're at the end of the input, and the decompressor hasn't
|
|
|
4408 reported EOF, we need to keep going, as there might be more output
|
|
|
4409 to generate. Z_OK from the decompressor means input was processed
|
|
|
4410 or output was generated; if neither, we break out of the loop.
|
|
|
4411 Other return values are:
|
|
|
4412
|
|
|
4413 Z_STREAM_END EOF from decompressor
|
|
|
4414 Z_DATA_ERROR Corrupted data
|
|
|
4415 Z_BUF_ERROR No progress possible (this should happen if
|
|
|
4416 we try to feed it an incomplete file)
|
|
|
4417 Z_MEM_ERROR Out of memory
|
|
|
4418 Z_STREAM_ERROR (should never happen)
|
|
|
4419 Z_NEED_DICT (#### when will this happen?)
|
|
|
4420 */
|
|
|
4421 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4422 {
|
|
|
4423 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4424 if that's not enough, we keep reserving the same size. */
|
|
|
4425 Bytecount reserved = n;
|
|
|
4426 Dynarr_add_many (dst, 0, reserved);
|
|
|
4427 /* Careful here! Don't retrieve the pointer until after
|
|
|
4428 reserving the space, or it might be bogus */
|
|
|
4429 data->stream.next_out =
|
|
|
4430 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4431 data->stream.avail_out = reserved;
|
|
|
4432 zerr = inflate (&data->stream, Z_NO_FLUSH);
|
|
|
4433 /* Lop off the unused portion */
|
|
|
4434 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4435 if (zerr != Z_OK)
|
|
|
4436 break;
|
|
|
4437 }
|
|
|
4438
|
|
|
4439 if (zerr == Z_STREAM_END)
|
|
|
4440 data->reached_eof = 1;
|
|
|
4441
|
|
|
4442 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4443 return n - data->stream.avail_in;
|
|
|
4444
|
|
|
4445 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4446 return 0;
|
|
|
4447
|
|
|
4448 return LSTREAM_ERROR;
|
|
428
|
4449 }
|
|
|
4450 else
|
|
|
4451 {
|
|
771
|
4452 if (!data->stream_initted)
|
|
|
4453 {
|
|
|
4454 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys);
|
|
|
4455 xzero (data->stream);
|
|
|
4456 if (deflateInit (&data->stream,
|
|
|
4457 level == -1 ? Z_DEFAULT_COMPRESSION : level) !=
|
|
|
4458 Z_OK)
|
|
|
4459 return LSTREAM_ERROR;
|
|
|
4460 data->stream_initted = 1;
|
|
428
|
4461 }
|
|
771
|
4462
|
|
|
4463 data->stream.next_in = (Bytef *) src;
|
|
|
4464 data->stream.avail_in = n;
|
|
|
4465
|
|
|
4466 /* Normally we stop when we've fed all data to the compressor; but if
|
|
|
4467 we're at the end of the input, and the compressor hasn't reported
|
|
|
4468 EOF, we need to keep going, as there might be more output to
|
|
|
4469 generate. (To signal EOF on our end, we set the FLUSH parameter
|
|
|
4470 to Z_FINISH; when all data is output, Z_STREAM_END will be
|
|
|
4471 returned.) Z_OK from the compressor means input was processed or
|
|
|
4472 output was generated; if neither, we break out of the loop. Other
|
|
|
4473 return values are:
|
|
|
4474
|
|
|
4475 Z_STREAM_END EOF from compressor
|
|
|
4476 Z_BUF_ERROR No progress possible (should never happen)
|
|
|
4477 Z_STREAM_ERROR (should never happen)
|
|
|
4478 */
|
|
|
4479 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4480 {
|
|
|
4481 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4482 if that's not enough, we keep reserving the same size. */
|
|
|
4483 Bytecount reserved = n;
|
|
|
4484 Dynarr_add_many (dst, 0, reserved);
|
|
|
4485 /* Careful here! Don't retrieve the pointer until after
|
|
|
4486 reserving the space, or it might be bogus */
|
|
|
4487 data->stream.next_out =
|
|
|
4488 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4489 data->stream.avail_out = reserved;
|
|
|
4490 zerr =
|
|
|
4491 deflate (&data->stream,
|
|
|
4492 str->eof ? Z_FINISH : Z_NO_FLUSH);
|
|
|
4493 /* Lop off the unused portion */
|
|
|
4494 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4495 if (zerr != Z_OK)
|
|
|
4496 break;
|
|
|
4497 }
|
|
|
4498
|
|
|
4499 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4500 return n - data->stream.avail_in;
|
|
|
4501
|
|
|
4502 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4503 return 0;
|
|
|
4504
|
|
|
4505 return LSTREAM_ERROR;
|
|
428
|
4506 }
|
|
|
4507 }
|
|
|
4508
|
|
771
|
4509 #endif /* HAVE_ZLIB */
|
|
428
|
4510
|
|
|
4511
|
|
|
4512 /************************************************************************/
|
|
|
4513 /* Initialization */
|
|
|
4514 /************************************************************************/
|
|
|
4515
|
|
|
4516 void
|
|
|
4517 syms_of_file_coding (void)
|
|
|
4518 {
|
|
442
|
4519 INIT_LRECORD_IMPLEMENTATION (coding_system);
|
|
|
4520
|
|
771
|
4521 DEFSUBR (Fvalid_coding_system_type_p);
|
|
|
4522 DEFSUBR (Fcoding_system_type_list);
|
|
428
|
4523 DEFSUBR (Fcoding_system_p);
|
|
|
4524 DEFSUBR (Ffind_coding_system);
|
|
|
4525 DEFSUBR (Fget_coding_system);
|
|
|
4526 DEFSUBR (Fcoding_system_list);
|
|
|
4527 DEFSUBR (Fcoding_system_name);
|
|
|
4528 DEFSUBR (Fmake_coding_system);
|
|
|
4529 DEFSUBR (Fcopy_coding_system);
|
|
440
|
4530 DEFSUBR (Fcoding_system_canonical_name_p);
|
|
|
4531 DEFSUBR (Fcoding_system_alias_p);
|
|
|
4532 DEFSUBR (Fcoding_system_aliasee);
|
|
428
|
4533 DEFSUBR (Fdefine_coding_system_alias);
|
|
|
4534 DEFSUBR (Fsubsidiary_coding_system);
|
|
771
|
4535 DEFSUBR (Fcoding_system_base);
|
|
|
4536 DEFSUBR (Fcoding_system_used_for_io);
|
|
428
|
4537
|
|
|
4538 DEFSUBR (Fcoding_system_type);
|
|
771
|
4539 DEFSUBR (Fcoding_system_description);
|
|
428
|
4540 DEFSUBR (Fcoding_system_property);
|
|
|
4541
|
|
|
4542 DEFSUBR (Fcoding_category_list);
|
|
|
4543 DEFSUBR (Fset_coding_priority_list);
|
|
|
4544 DEFSUBR (Fcoding_priority_list);
|
|
|
4545 DEFSUBR (Fset_coding_category_system);
|
|
|
4546 DEFSUBR (Fcoding_category_system);
|
|
|
4547
|
|
|
4548 DEFSUBR (Fdetect_coding_region);
|
|
|
4549 DEFSUBR (Fdecode_coding_region);
|
|
|
4550 DEFSUBR (Fencode_coding_region);
|
|
563
|
4551 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp);
|
|
|
4552 DEFSYMBOL (Qno_conversion);
|
|
771
|
4553 DEFSYMBOL (Qconvert_eol);
|
|
|
4554 DEFSYMBOL (Qconvert_eol_autodetect);
|
|
|
4555 DEFSYMBOL (Qconvert_eol_lf);
|
|
|
4556 DEFSYMBOL (Qconvert_eol_cr);
|
|
|
4557 DEFSYMBOL (Qconvert_eol_crlf);
|
|
563
|
4558 DEFSYMBOL (Qraw_text);
|
|
771
|
4559
|
|
563
|
4560 DEFSYMBOL (Qmnemonic);
|
|
|
4561 DEFSYMBOL (Qeol_type);
|
|
|
4562 DEFSYMBOL (Qpost_read_conversion);
|
|
|
4563 DEFSYMBOL (Qpre_write_conversion);
|
|
|
4564
|
|
771
|
4565 DEFSYMBOL (Qtranslation_table_for_decode);
|
|
|
4566 DEFSYMBOL (Qtranslation_table_for_encode);
|
|
|
4567 DEFSYMBOL (Qsafe_chars);
|
|
|
4568 DEFSYMBOL (Qsafe_charsets);
|
|
|
4569 DEFSYMBOL (Qmime_charset);
|
|
|
4570 DEFSYMBOL (Qvalid_codes);
|
|
|
4571
|
|
563
|
4572 DEFSYMBOL (Qcr);
|
|
|
4573 DEFSYMBOL (Qlf);
|
|
|
4574 DEFSYMBOL (Qcrlf);
|
|
|
4575 DEFSYMBOL (Qeol_cr);
|
|
|
4576 DEFSYMBOL (Qeol_lf);
|
|
|
4577 DEFSYMBOL (Qeol_crlf);
|
|
|
4578 DEFSYMBOL (Qencode);
|
|
|
4579 DEFSYMBOL (Qdecode);
|
|
428
|
4580
|
|
771
|
4581 DEFSYMBOL (Qnear_certainty);
|
|
|
4582 DEFSYMBOL (Qquite_probable);
|
|
|
4583 DEFSYMBOL (Qsomewhat_likely);
|
|
|
4584 DEFSYMBOL (Qas_likely_as_unlikely);
|
|
|
4585 DEFSYMBOL (Qsomewhat_unlikely);
|
|
|
4586 DEFSYMBOL (Qquite_improbable);
|
|
|
4587 DEFSYMBOL (Qnearly_impossible);
|
|
|
4588
|
|
|
4589 DEFSYMBOL (Qdo_eol);
|
|
|
4590 DEFSYMBOL (Qdo_coding);
|
|
|
4591
|
|
|
4592 DEFSYMBOL (Qcanonicalize_after_coding);
|
|
|
4593
|
|
|
4594 DEFSYMBOL (Qescape_quoted);
|
|
|
4595
|
|
|
4596 #ifdef HAVE_ZLIB
|
|
|
4597 DEFSYMBOL (Qgzip);
|
|
|
4598 #endif
|
|
|
4599
|
|
|
4600 /* WARNING: The existing categories are intimately tied to the function
|
|
|
4601 `coding-system-category' in coding.el. If you change a category, or
|
|
|
4602 change the layout of any coding system associated with a category, you
|
|
|
4603 need to check that function and make sure it's written properly. */
|
|
|
4604
|
|
|
4605 #ifdef HAVE_DEFAULT_EOL_DETECTION
|
|
|
4606 Fprovide (intern ("unix-default-eol-detection"));
|
|
|
4607 #endif
|
|
428
|
4608 }
|
|
|
4609
|
|
|
4610 void
|
|
|
4611 lstream_type_create_file_coding (void)
|
|
|
4612 {
|
|
771
|
4613 LSTREAM_HAS_METHOD (coding, reader);
|
|
|
4614 LSTREAM_HAS_METHOD (coding, writer);
|
|
|
4615 LSTREAM_HAS_METHOD (coding, rewinder);
|
|
|
4616 LSTREAM_HAS_METHOD (coding, seekable_p);
|
|
|
4617 LSTREAM_HAS_METHOD (coding, marker);
|
|
|
4618 LSTREAM_HAS_METHOD (coding, flusher);
|
|
|
4619 LSTREAM_HAS_METHOD (coding, closer);
|
|
|
4620 LSTREAM_HAS_METHOD (coding, finalizer);
|
|
|
4621 }
|
|
|
4622
|
|
|
4623 void
|
|
|
4624 coding_system_type_create (void)
|
|
|
4625 {
|
|
|
4626 int i;
|
|
|
4627
|
|
|
4628 staticpro (&Vcoding_system_hash_table);
|
|
|
4629 Vcoding_system_hash_table =
|
|
|
4630 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
4631
|
|
|
4632 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry);
|
|
|
4633 dump_add_root_struct_ptr (&the_coding_system_type_entry_dynarr,
|
|
|
4634 &csted_description);
|
|
|
4635
|
|
|
4636 Vcoding_system_type_list = Qnil;
|
|
|
4637 staticpro (&Vcoding_system_type_list);
|
|
|
4638
|
|
|
4639 /* Initialize to something reasonable ... */
|
|
|
4640 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++)
|
|
|
4641 {
|
|
|
4642 coding_category_system[i] = Qnil;
|
|
|
4643 dump_add_root_object (&coding_category_system[i]);
|
|
|
4644 coding_category_by_priority[i] = i;
|
|
|
4645 }
|
|
|
4646
|
|
|
4647 dump_add_opaque (coding_category_by_priority,
|
|
|
4648 sizeof (coding_category_by_priority));
|
|
|
4649
|
|
|
4650 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector);
|
|
|
4651 dump_add_root_struct_ptr (&all_coding_detectors,
|
|
|
4652 &detector_dynarr_description);
|
|
|
4653
|
|
|
4654 dump_add_opaque_int (&coding_system_tick);
|
|
|
4655 dump_add_opaque_int (&coding_detector_count);
|
|
|
4656 dump_add_opaque_int (&coding_detector_category_count);
|
|
|
4657
|
|
|
4658 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion,
|
|
|
4659 "no-conversion-coding-system-p");
|
|
|
4660 CODING_SYSTEM_HAS_METHOD (no_conversion, convert);
|
|
|
4661
|
|
|
4662 INITIALIZE_DETECTOR (no_conversion);
|
|
|
4663 DETECTOR_HAS_METHOD (no_conversion, detect);
|
|
|
4664 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
4665
|
|
|
4666 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol,
|
|
|
4667 "convert-eol-coding-system-p");
|
|
|
4668 CODING_SYSTEM_HAS_METHOD (convert_eol, print);
|
|
|
4669 CODING_SYSTEM_HAS_METHOD (convert_eol, convert);
|
|
|
4670 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop);
|
|
|
4671 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop);
|
|
|
4672 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type);
|
|
|
4673 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding);
|
|
|
4674 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream);
|
|
|
4675
|
|
|
4676 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided,
|
|
|
4677 "undecided-coding-system-p");
|
|
|
4678 CODING_SYSTEM_HAS_METHOD (undecided, init);
|
|
|
4679 CODING_SYSTEM_HAS_METHOD (undecided, mark);
|
|
|
4680 CODING_SYSTEM_HAS_METHOD (undecided, print);
|
|
|
4681 CODING_SYSTEM_HAS_METHOD (undecided, convert);
|
|
|
4682 CODING_SYSTEM_HAS_METHOD (undecided, putprop);
|
|
|
4683 CODING_SYSTEM_HAS_METHOD (undecided, getprop);
|
|
|
4684 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream);
|
|
|
4685 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream);
|
|
|
4686 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream);
|
|
|
4687 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream);
|
|
|
4688 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize);
|
|
|
4689 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding);
|
|
|
4690
|
|
|
4691 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p");
|
|
|
4692
|
|
|
4693 CODING_SYSTEM_HAS_METHOD (chain, print);
|
|
|
4694 CODING_SYSTEM_HAS_METHOD (chain, canonicalize);
|
|
|
4695 CODING_SYSTEM_HAS_METHOD (chain, init);
|
|
|
4696 CODING_SYSTEM_HAS_METHOD (chain, mark);
|
|
|
4697 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream);
|
|
|
4698 CODING_SYSTEM_HAS_METHOD (chain, convert);
|
|
|
4699 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream);
|
|
|
4700 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream);
|
|
|
4701 CODING_SYSTEM_HAS_METHOD (chain, finalize);
|
|
|
4702 CODING_SYSTEM_HAS_METHOD (chain, putprop);
|
|
|
4703 CODING_SYSTEM_HAS_METHOD (chain, getprop);
|
|
|
4704 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type);
|
|
|
4705 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding);
|
|
|
4706
|
|
|
4707 #ifdef DEBUG_XEMACS
|
|
|
4708 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p");
|
|
|
4709 CODING_SYSTEM_HAS_METHOD (internal, convert);
|
|
|
4710 #endif
|
|
|
4711
|
|
|
4712 #ifdef HAVE_ZLIB
|
|
|
4713 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p");
|
|
|
4714 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type);
|
|
|
4715 CODING_SYSTEM_HAS_METHOD (gzip, convert);
|
|
|
4716 CODING_SYSTEM_HAS_METHOD (gzip, init);
|
|
|
4717 CODING_SYSTEM_HAS_METHOD (gzip, print);
|
|
|
4718 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream);
|
|
|
4719 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream);
|
|
|
4720 CODING_SYSTEM_HAS_METHOD (gzip, putprop);
|
|
|
4721 CODING_SYSTEM_HAS_METHOD (gzip, getprop);
|
|
|
4722 #endif
|
|
|
4723 }
|
|
|
4724
|
|
|
4725 void
|
|
|
4726 reinit_coding_system_type_create (void)
|
|
|
4727 {
|
|
|
4728 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
4729 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol);
|
|
|
4730 REINITIALIZE_CODING_SYSTEM_TYPE (undecided);
|
|
|
4731 REINITIALIZE_CODING_SYSTEM_TYPE (chain);
|
|
|
4732 #if 0
|
|
|
4733 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper);
|
|
|
4734 #endif /* 0 */
|
|
|
4735 #ifdef DEBUG_XEMACS
|
|
|
4736 REINITIALIZE_CODING_SYSTEM_TYPE (internal);
|
|
|
4737 #endif
|
|
|
4738 #ifdef HAVE_ZLIB
|
|
|
4739 REINITIALIZE_CODING_SYSTEM_TYPE (gzip);
|
|
|
4740 #endif
|
|
|
4741 }
|
|
|
4742
|
|
|
4743 void
|
|
|
4744 reinit_vars_of_file_coding (void)
|
|
|
4745 {
|
|
428
|
4746 }
|
|
|
4747
|
|
|
4748 void
|
|
|
4749 vars_of_file_coding (void)
|
|
|
4750 {
|
|
771
|
4751 reinit_vars_of_file_coding ();
|
|
|
4752
|
|
|
4753 /* We always have file-coding support */
|
|
428
|
4754 Fprovide (intern ("file-coding"));
|
|
|
4755
|
|
|
4756 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4757 Coding system used for TTY keyboard input.
|
|
|
4758 Not used under a windowing system.
|
|
|
4759 */ );
|
|
|
4760 Vkeyboard_coding_system = Qnil;
|
|
|
4761
|
|
|
4762 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4763 Coding system used for TTY display output.
|
|
|
4764 Not used under a windowing system.
|
|
|
4765 */ );
|
|
|
4766 Vterminal_coding_system = Qnil;
|
|
|
4767
|
|
|
4768 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
440
|
4769 Overriding coding system used when reading from a file or process.
|
|
|
4770 You should bind this variable with `let', but do not set it globally.
|
|
|
4771 If this is non-nil, it specifies the coding system that will be used
|
|
|
4772 to decode input on read operations, such as from a file or process.
|
|
|
4773 It overrides `buffer-file-coding-system-for-read',
|
|
428
|
4774 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
440
|
4775 this one for permanent changes to the environment. */ );
|
|
428
|
4776 Vcoding_system_for_read = Qnil;
|
|
|
4777
|
|
|
4778 DEFVAR_LISP ("coding-system-for-write",
|
|
|
4779 &Vcoding_system_for_write /*
|
|
440
|
4780 Overriding coding system used when writing to a file or process.
|
|
|
4781 You should bind this variable with `let', but do not set it globally.
|
|
|
4782 If this is non-nil, it specifies the coding system that will be used
|
|
|
4783 to encode output for write operations, such as to a file or process.
|
|
|
4784 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
|
|
|
4785 Use those variables instead of this one for permanent changes to the
|
|
|
4786 environment. */ );
|
|
428
|
4787 Vcoding_system_for_write = Qnil;
|
|
|
4788
|
|
|
4789 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
4790 Coding system used to convert pathnames when accessing files.
|
|
|
4791 */ );
|
|
|
4792 Vfile_name_coding_system = Qnil;
|
|
|
4793
|
|
|
4794 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
771
|
4795 Setting this has no effect. It is purely for FSF compatibility.
|
|
428
|
4796 */ );
|
|
|
4797 enable_multibyte_characters = 1;
|
|
771
|
4798
|
|
|
4799 Vchain_canonicalize_hash_table =
|
|
|
4800 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL);
|
|
|
4801 staticpro (&Vchain_canonicalize_hash_table);
|
|
|
4802
|
|
|
4803 #ifdef DEBUG_XEMACS
|
|
|
4804 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /*
|
|
|
4805 If non-nil, display debug information about detection operations in progress.
|
|
|
4806 Information is displayed on stderr.
|
|
|
4807 */ );
|
|
|
4808 Vdebug_coding_detection = Qnil;
|
|
|
4809 #endif
|
|
428
|
4810 }
|
|
|
4811
|
|
|
4812 void
|
|
|
4813 complex_vars_of_file_coding (void)
|
|
|
4814 {
|
|
771
|
4815 Fmake_coding_system
|
|
|
4816 (Qconvert_eol_cr, Qconvert_eol,
|
|
|
4817 build_msg_string ("Convert CR to LF"),
|
|
|
4818 nconc2 (list6 (Qdocumentation,
|
|
|
4819 build_msg_string (
|
|
|
4820 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4821 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4822 Qmnemonic, build_string ("CR->LF"),
|
|
|
4823 Qsubtype, Qcr),
|
|
|
4824 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4825 subsidiaries -- it needs the coding systems we're creating
|
|
|
4826 to do so! */
|
|
|
4827 list2 (Qeol_type, Qlf)));
|
|
|
4828
|
|
|
4829 Fmake_coding_system
|
|
|
4830 (Qconvert_eol_lf, Qconvert_eol,
|
|
|
4831 build_msg_string ("Convert LF to LF (do nothing)"),
|
|
|
4832 nconc2 (list6 (Qdocumentation,
|
|
|
4833 build_msg_string (
|
|
|
4834 "Do nothing."),
|
|
|
4835 Qmnemonic, build_string ("LF->LF"),
|
|
|
4836 Qsubtype, Qlf),
|
|
|
4837 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4838 subsidiaries -- it needs the coding systems we're creating
|
|
|
4839 to do so! */
|
|
|
4840 list2 (Qeol_type, Qlf)));
|
|
|
4841
|
|
|
4842 Fmake_coding_system
|
|
|
4843 (Qconvert_eol_crlf, Qconvert_eol,
|
|
|
4844 build_msg_string ("Convert CRLF to LF"),
|
|
|
4845 nconc2 (list6 (Qdocumentation,
|
|
|
4846 build_msg_string (
|
|
|
4847 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4848 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4849 Qmnemonic, build_string ("CRLF->LF"),
|
|
|
4850 Qsubtype, Qcrlf),
|
|
|
4851 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4852 subsidiaries -- it needs the coding systems we're creating
|
|
|
4853 to do so! */
|
|
|
4854 list2 (Qeol_type, Qlf)));
|
|
|
4855
|
|
|
4856 Fmake_coding_system
|
|
|
4857 (Qconvert_eol_autodetect, Qconvert_eol,
|
|
|
4858 build_msg_string ("Autodetect EOL type"),
|
|
|
4859 nconc2 (list6 (Qdocumentation,
|
|
|
4860 build_msg_string (
|
|
|
4861 "Autodetect the end-of-line type."),
|
|
|
4862 Qmnemonic, build_string ("Auto-EOL"),
|
|
793
|
4863 Qsubtype, Qnil),
|
|
771
|
4864 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4865 subsidiaries -- it needs the coding systems we're creating
|
|
|
4866 to do so! */
|
|
|
4867 list2 (Qeol_type, Qlf)));
|
|
|
4868
|
|
|
4869 Fmake_coding_system
|
|
|
4870 (Qundecided, Qundecided,
|
|
|
4871 build_msg_string ("Undecided (auto-detect)"),
|
|
|
4872 nconc2 (list4 (Qdocumentation,
|
|
|
4873 build_msg_string
|
|
|
4874 ("Automatically detects the correct encoding."),
|
|
|
4875 Qmnemonic, build_string ("Auto")),
|
|
|
4876 list6 (Qdo_eol, Qt, Qdo_coding, Qt,
|
|
|
4877 /* We do EOL detection ourselves so we don't need to be
|
|
|
4878 wrapped in an EOL detector. (It doesn't actually hurt,
|
|
|
4879 though, I don't think.) */
|
|
|
4880 Qeol_type, Qlf)));
|
|
|
4881
|
|
|
4882 Fmake_coding_system
|
|
|
4883 (intern ("undecided-dos"), Qundecided,
|
|
|
4884 build_msg_string ("Undecided (auto-detect) (CRLF)"),
|
|
|
4885 nconc2 (list4 (Qdocumentation,
|
|
|
4886 build_msg_string
|
|
|
4887 ("Automatically detects the correct encoding; EOL type of CRLF forced."),
|
|
|
4888 Qmnemonic, build_string ("Auto")),
|
|
|
4889 list4 (Qdo_coding, Qt,
|
|
|
4890 Qeol_type, Qcrlf)));
|
|
|
4891
|
|
|
4892 Fmake_coding_system
|
|
|
4893 (intern ("undecided-unix"), Qundecided,
|
|
|
4894 build_msg_string ("Undecided (auto-detect) (LF)"),
|
|
|
4895 nconc2 (list4 (Qdocumentation,
|
|
|
4896 build_msg_string
|
|
|
4897 ("Automatically detects the correct encoding; EOL type of LF forced."),
|
|
|
4898 Qmnemonic, build_string ("Auto")),
|
|
|
4899 list4 (Qdo_coding, Qt,
|
|
|
4900 Qeol_type, Qlf)));
|
|
|
4901
|
|
|
4902 Fmake_coding_system
|
|
|
4903 (intern ("undecided-mac"), Qundecided,
|
|
|
4904 build_msg_string ("Undecided (auto-detect) (CR)"),
|
|
|
4905 nconc2 (list4 (Qdocumentation,
|
|
|
4906 build_msg_string
|
|
|
4907 ("Automatically detects the correct encoding; EOL type of CR forced."),
|
|
|
4908 Qmnemonic, build_string ("Auto")),
|
|
|
4909 list4 (Qdo_coding, Qt,
|
|
|
4910 Qeol_type, Qcr)));
|
|
|
4911
|
|
428
|
4912 /* Need to create this here or we're really screwed. */
|
|
|
4913 Fmake_coding_system
|
|
|
4914 (Qraw_text, Qno_conversion,
|
|
771
|
4915 build_msg_string ("Raw Text"),
|
|
|
4916 list4 (Qdocumentation,
|
|
|
4917 build_msg_string ("Raw text converts only line-break codes, and acts otherwise like `binary'."),
|
|
|
4918 Qmnemonic, build_string ("Raw")));
|
|
428
|
4919
|
|
|
4920 Fmake_coding_system
|
|
|
4921 (Qbinary, Qno_conversion,
|
|
771
|
4922 build_msg_string ("Binary"),
|
|
|
4923 list6 (Qdocumentation,
|
|
|
4924 build_msg_string (
|
|
|
4925 "This coding system is as close as it comes to doing no conversion.\n"
|
|
|
4926 "On input, each byte is converted directly into the character\n"
|
|
|
4927 "with the corresponding code -- i.e. from the `ascii', `control-1',\n"
|
|
|
4928 "or `latin-1' character sets. On output, these characters are\n"
|
|
|
4929 "converted back to the corresponding bytes, and other characters\n"
|
|
|
4930 "are converted to the default character, i.e. `~'."),
|
|
|
4931 Qeol_type, Qlf,
|
|
428
|
4932 Qmnemonic, build_string ("Binary")));
|
|
|
4933
|
|
771
|
4934 /* Formerly aliased to raw-text! Completely bogus and not even the same
|
|
|
4935 as FSF Emacs. */
|
|
|
4936 Fdefine_coding_system_alias (Qno_conversion, Qbinary);
|
|
|
4937 Fdefine_coding_system_alias (intern ("no-conversion-unix"),
|
|
|
4938 intern ("raw-text-unix"));
|
|
|
4939 Fdefine_coding_system_alias (intern ("no-conversion-dos"),
|
|
|
4940 intern ("raw-text-dos"));
|
|
|
4941 Fdefine_coding_system_alias (intern ("no-conversion-mac"),
|
|
|
4942 intern ("raw-text-mac"));
|
|
|
4943
|
|
|
4944 /* These four below will get their defaults set correctly in
|
|
|
4945 code-init.el. We init them now so we can handle stuff at dump
|
|
|
4946 time before we get to code-init.el. */
|
|
440
|
4947 Fdefine_coding_system_alias (Qfile_name, Qbinary);
|
|
771
|
4948 Fdefine_coding_system_alias (Qnative, Qfile_name);
|
|
440
|
4949
|
|
|
4950 Fdefine_coding_system_alias (Qterminal, Qbinary);
|
|
|
4951 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
|
|
|
4952
|
|
771
|
4953 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf);
|
|
|
4954
|
|
428
|
4955 /* Need this for bootstrapping */
|
|
771
|
4956 coding_category_system[detector_category_no_conversion] =
|
|
428
|
4957 Fget_coding_system (Qraw_text);
|
|
|
4958 }
|
